Tutorials

AI Evals

A 16-lesson, step-by-step tutorial on the mindset of checking whether your AI does the right thing on a given question — not whether the answer just sounds nice — using short, repeatable test cards. Goes all the way through building a Study Eval Pack.

18 Lessons · 180 min

AI Foundations

A 20-lesson tutorial series that walks you through AI from the ground up, explained like a friend talking you through it — starting with the basics and building up to Prompt Engineering, LLMs, AI APIs, chat apps, LangChain, RAG, vector databases, AI agents, privacy, and your very first AI project.

22 Lessons · 360 min

Android Development

Let's start from the basics of building native Android apps with Kotlin + Jetpack Compose — a 25-lesson tutorial that walks you step by step from Composable, State, and Navigation all the way to ViewModel, Room, Retrofit, Coroutines, and a production-ready project.

25 Lessons · 220 min

Angular

43 lessons to learn Angular step by step, from the basics on up.

48 Lessons · 344 min

API Integration & Webhooks

The sequel to API Tutorial -- 25 lessons on the parts of real API integration that tutorial doesn't cover: webhooks, a real Postman workflow, reliability engineering (idempotency, timeouts, backoff), secret management, response validation, documentation reading, and full third-party integration architecture, closing with a webhook receiver, a Postman collection, and a complete integration project.

25 Lessons · 650 min

API Tutorial

A 28-lesson tutorial that takes you through APIs step by step, starting from the absolute basics.

33 Lessons · 224 min

DevOpsbeginner

AWS Fundamentals

Start AWS cloud from the ground up — 25 step-by-step tutorials covering EC2, S3, RDS, VPC, IAM all the way to Lambda, API Gateway, DynamoDB, and a production-ready project.

25 Lessons · 220 min

Bash / Shell Scripting

A complete 25-lesson Bash scripting course — from variables, quoting, and control flow through arrays, text processing with grep/sed/awk, strict mode, trap-based cleanup, and argument parsing, culminating in a log file analyzer, an automated backup script with rotation, and a system health-check framework.

25 Lessons · 750 min

Securityadvanced

Blockchain

A 31-chapter tutorial that takes you through Blockchain step by step, starting from the basics.

36 Lessons · 248 min

C

30 lessons that take you through C step by step, starting from the basics.

32 Lessons · 240 min

C#

Learn C# step by step from the basics, across 28 lessons.

33 Lessons · 224 min

C++

A 25-chapter tutorial series that takes you through C++ step by step, starting from the basics.

30 Lessons · 200 min

CI/CD with GitHub Actions

A complete 25-lesson CI/CD course built on GitHub Actions, diagram-first — from what continuous integration and delivery actually mean through workflow anatomy, triggers, caching, matrix builds, artifacts and secrets, then deployment environments and approvals, deployment strategies, rollback, pipeline performance, flaky tests and supply-chain security, closing with a full CI pipeline, a Docker build-and-push, and a staging-to-production pipeline with human approval.

25 Lessons · 750 min

Cloud & Deployment

The orientation course before you specialize: 25 lessons on how code becomes a live, production website -- deployment fundamentals, domains and DNS, HTTPS, hosting categories, environment variables and secrets, cloud service models, serverless and CDN, production databases, scaling, monitoring, security, and disaster recovery -- with a deployment decision guide, a troubleshooting flow, and a production checklist, closing with real architecture design projects. Points to this site's dedicated Docker, Terraform, AWS, Kubernetes, Networking, and CI/CD tutorials for hands-on depth rather than repeating them.

25 Lessons · 720 min

Cloud Providers & Platforms

The sequel to Cloud & Deployment -- 25 lessons mapping the actual provider and platform landscape: AWS, Google Cloud, and Azure fairly compared; Cloudflare, Vercel, Netlify, Railway, and Render as modern deployment platforms; Supabase and Firebase as Backend-as-a-Service; and how to actually choose between them, closing with real platform-selection projects.

25 Lessons · 640 min

Computer Networking

A complete 25-lesson computer networking course, diagram-first — from packets, the OSI/TCP-IP layers, IP addressing and subnetting through TCP, DNS, HTTP, routing and NAT, then TLS, DHCP, firewalls, load balancing and IPv6, closing with a subnet calculator, a packet header parser, and a layered network diagnostic tool.

25 Lessons · 750 min

AIintermediate

Computer Vision

A complete 25-lesson Computer Vision course — from pixels, classical filtering, and features through CNN architectures, transfer learning, object detection, segmentation, vision transformers, and generative vision models, culminating in an image classifier, a fine-tuned classifier, and a simple object detector.

25 Lessons · 750 min

Context Engineering

A 16-chapter, step-by-step walkthrough of what to add next to your prompt, what to cut, and what to do when your notes go stale — all the way through a hands-on Study Context Pack.

18 Lessons · 180 min

CSS

A 30-lesson tutorial series for learning CSS step by step, right from the basics.

32 Lessons · 268 min

Securitybeginner

Cybersecurity

A 25-chapter, step-by-step cybersecurity tutorial — from the CIA Triad through password/2FA/phishing awareness, the OWASP Top 10, Linux server hardening, all the way to a Personal Security Audit project.

25 Lessons · 200 min

Dart

A 20-lesson tutorial series to learn Dart from the ground up, step by step.

22 Lessons · 160 min

Programmingintermediate

Data Structures & Algorithms

A complete 25-lesson Data Structures & Algorithms course in Python — from Big-O and recursion through linked lists, hash tables, trees, sorting, graphs, and dynamic programming, culminating in an LRU cache, a graph pathfinder, and a Trie-based autocomplete engine.

25 Lessons · 750 min

AIintermediate

Deep Learning with PyTorch

A complete 25-lesson Deep Learning course with PyTorch — from tensors, autograd, and backpropagation through CNNs, RNNs, attention, and transformers, culminating in an image classifier, a text classifier, and a mini transformer built from scratch.

25 Lessons · 750 min

Digital Businessbeginner

Digital Business

Not 'easy ways to make money online' -- 25 lessons on how digital businesses actually work: SaaS, digital products, courses, membership, affiliate marketing, freelancing, consulting, agency, creator business, AI services, automation services, pricing, and client acquisition, closing with a full personal Digital Business Blueprint. Honest about risk, uncertainty, and the work involved -- no income guarantees, no manipulative sales tactics.

25 Lessons · 660 min

Securityintermediate

Digital Privacy & Modern Security

The sequel to Cybersecurity Basics -- 25 lessons on what that course doesn't cover: passkeys, public Wi-Fi and VPN risks, browser security depth, digital privacy fundamentals, developer-focused authentication and API security, and AI/vibe-coding security, closing with real defensive projects. Purely defensive education -- no exploit instructions.

25 Lessons · 630 min

Docker

A step-by-step Docker tutorial with 18 lessons, from the basics on up.

20 Lessons · 144 min

Elasticsearch

A complete 25-lesson Elasticsearch course from installation and the core data model through mapping, the Query DSL, aggregations, performance tuning, security, and the Node.js client, culminating in hands-on search backend, autocomplete, and analytics dashboard projects.

25 Lessons · 750 min

Mobile Developmentbeginner

Firebase Tutorial

A 29-lesson Firebase Tutorial you can follow step by step, starting from the basics.

31 Lessons · 232 min

Flutter

A 20-lesson tutorial to learn Flutter step by step, from the basics up.

22 Lessons · 160 min

Git

20 lessons that take you through Git step by step, starting from the basics.

25 Lessons · 160 min

Git & GitHub: Collaboration and Professional Workflows

The sequel to this site's Git tutorial: 25 lessons on everything GitHub adds on top of Git — Pull Requests, code review, Issues, tags and releases, advanced history tools (rebase, cherry-pick, bisect, reflog), professional branching strategies, GitHub security (SSH, tokens, branch protection), and a dedicated Git-with-AI-coding-agents workflow, closing with three real collaboration projects.

25 Lessons · 760 min

Go

20 lessons that take you through Go step by step, starting from the basics.

25 Lessons · 160 min

GraphQL

A complete 25-lesson GraphQL course from schema design and queries through mutations, resolvers, the N+1 problem, Apollo Server and Client, authentication, subscriptions, federation basics, and hands-on Blog API projects.

25 Lessons · 500 min

How Databases Work

The database system map -- 25 lessons connecting the framework-neutral mental model (data, tables, keys, relationships, transactions), a fair SQL vs NoSQL landscape, database design skill, security fundamentals, and the AI/vector-database distinction, with pointers to this site's SQL, PostgreSQL, MongoDB, and Redis tutorials for hands-on depth.

25 Lessons · 610 min

How Mobile Apps Work

The mobile app system map -- 25 lessons connecting Android Development, Flutter, iOS Development, and React Native into one architecture: native vs cross-platform, Expo, a fair framework comparison, mobile authentication and push-notification architecture, build/signing/APK-AAB, Google Play vs App Store, and mobile-specific production and security concerns -- with pointers to those four tutorials for hands-on framework depth.

25 Lessons · 640 min

How the Web Works

The web development system map -- 25 lessons connecting the Internet, browsers, DNS, servers, frontend/backend, databases, APIs, authentication, rendering models, real-time communication, and PWAs into one coherent architecture picture, with pointers to this site's deep-dive courses for every piece that already has one.

25 Lessons · 620 min

HTML

36 lessons to learn HTML step by step, starting from the basics.

38 Lessons · 288 min

iOS Development

Let's start from the ground up with building native iOS apps using Swift + SwiftUI — 25 step-by-step lessons taking you from View, State, and Navigation all the way through ObservableObject, SwiftData, URLSession, Swift Concurrency, and a production-ready project.

25 Lessons · 220 min

Java

27 tutorials that take you through Java step by step, starting from the basics.

32 Lessons · 216 min

JavaScript

A 49-chapter tutorial that takes you through JavaScript step by step, from the basics up.

51 Lessons · 392 min

Kotlin

22 lessons that take you through Kotlin step by step, right from the basics.

27 Lessons · 176 min

DevOpsintermediate

Kubernetes

Let's level up from Docker containers to Kubernetes — 25 step-by-step tutorials covering Pod, Deployment, Service all the way to HPA, Rolling Update, Helm, RBAC, and a production-ready project.

25 Lessons · 220 min

AIadvanced

LangChain

15 lessons that take you through LangChain step by step, starting from the basics.

20 Lessons · 120 min

Linux

A friendly, step-by-step series of 35 lessons that takes the fear out of the Linux command line — starting from the basics and working up through the filesystem, permissions, shell scripting, processes, networking, and server setup.

37 Lessons · 280 min

Local AI / Local LLM

A complete 25-lesson course on running AI models on your own machine — Local AI vs Cloud AI, hardware and VRAM budgeting, quantization and model formats, Ollama and LM Studio, the local API, embeddings and local RAG, local agents and tool calling, security and privacy realities, fine-tuning vs RAG, and three hands-on projects: a chat assistant, a private document Q&A tool, and a local coding agent.

25 Lessons · 780 min

Machine Learning Basics

Let's get started with Machine Learning from the ground up using Python + scikit-learn — a 25-lesson tutorial that walks you step by step from Data Preprocessing, Regression, and Classification through Random Forest, a Neural Network intro, Hyperparameter Tuning, all the way to a production-ready project.

25 Lessons · 220 min

MongoDB

18 chapters that take you through MongoDB step by step, from the basics onward.

23 Lessons · 144 min

Securityintermediate

Network Security & Ethical Hacking

Let's start network security from the ground up, from both the attacker's and defender's perspective — 25 lessons that walk you step by step through legal/ethical boundaries, Nmap, Wireshark, and the OWASP Top 10, all the way to Metasploit, Incident Response, and professional reporting (everything here is built around an authorized lab environment only).

25 Lessons · 220 min

Next.js

28 hands-on lessons that take you from the basics of the Next.js 16 App Router through Server Components, data, forms, security, and all the way to production deployment.

33 Lessons · 504 min

Node.js

Learn Node.js from the ground up with this 18-lesson, step-by-step tutorial.

20 Lessons · 144 min

Numpy

A 16-lesson tutorial for learning Numpy step by step, from the basics up.

21 Lessons · 128 min

Pandas

A 16-chapter tutorial that takes you through Pandas step by step, from the basics up.

18 Lessons · 128 min

Hardwarebeginner

PC Build

A 22-chapter tutorial that walks you through PC Build step by step, starting from the basics.

27 Lessons · 176 min

PHP

30 tutorials that take you through PHP step by step, starting from the basics.

32 Lessons · 240 min

PostgreSQL

A complete 37-lesson PostgreSQL 18.6 course from SQL, schema design, and transactions through indexes, MVCC, security, performance, backup, monitoring, and a production Tutorial Platform capstone.

37 Lessons · 740 min

Productivitybeginner

Productivity Systems

Not another app tutorial -- 25 lessons on building a repeatable personal system: digital note taking, knowledge management, Notion, Obsidian, task and time management, AI productivity, personal knowledge bases, research workflow, and active learning, closing with three real system-building projects (Notion, Obsidian, and a hybrid setup).

25 Lessons · 700 min

Prompt Engineering

Stop talking to AI in fuzzy sentences — learn to give it a goal, context, constraints, and an output shape instead. 18 lessons, including a hands-on Study Prompt Pack project and two practice rounds.

18 Lessons · 180 min

Python

68 lessons that take you through Python step by step, starting from the basics.

70 Lessons · 544 min

RAG Chatbot

A 16-lesson, step-by-step tutorial on RAG — teaching AI to search your own notes for a real answer instead of just guessing from memory. It goes all the way through building an Ask Your Notes bot.

18 Lessons · 180 min

Hardwarebeginner

Raspberry Pi

25 step-by-step lessons covering everything from Raspberry Pi OS install/setup to GPIO, Python control, Linux tutorial concepts in action (SSH, systemd), a web dashboard, and a Temperature Monitor project.

25 Lessons · 200 min

React

A 21-lesson tutorial for learning React step by step, starting from the basics.

26 Lessons · 168 min

React Native

A step-by-step tutorial series of 25 lessons covering how to build iOS/Android apps with your React skills — from components, styling, and navigation to AsyncStorage, all the way through a Todo App project.

25 Lessons · 200 min

Redis

A complete 32-lesson Redis 8.10 course from keys and data types through caching, sessions, rate limits, Streams, memory, persistence, security, high availability, Cluster, and production projects.

32 Lessons · 640 min

Ruby

Learn Ruby step by step from the ground up in 24 lessons.

29 Lessons · 192 min

Rust

A complete 25-lesson Rust course from installation and ownership through structs, traits, generics, lifetimes, concurrency, and async, culminating in hands-on CLI, Axum API, and concurrent batch-processing projects.

25 Lessons · 750 min

SQL

Learn SQL step by step from the basics across 25 lessons.

30 Lessons · 200 min

Swift

24 lessons to learn Swift step by step, starting from the basics.

29 Lessons · 192 min

Programmingintermediate

System Design

A complete 25-lesson System Design course — from scalability, load balancing, and caching through databases, consistent hashing, the CAP theorem, and rate limiting, culminating in a URL shortener, a rate-limiter service, and a notification-system design project.

25 Lessons · 750 min

DevOpsintermediate

Terraform

Write your infrastructure as code and automate it — a 25-chapter, step-by-step tutorial covering everything from HCL syntax to state, modules, remote backends, count/for_each, security, and a full production project.

25 Lessons · 220 min

Programmingintermediate

TypeScript

A 15-part tutorial series that walks you through TypeScript step by step, starting from the basics.

20 Lessons · 120 min

Vibe Coding

A 20-chapter, step-by-step tutorial on vibe coding with AI — from the basics through spec writing, prompting, review, debugging, building a mini app, Git commits, and pushing to GitHub.

22 Lessons · 225 min