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For Windows OS and app development (Win32 API, Direct2D, UCRT, etc.), an effective way to use Microsoft Learn and the docs is to combine structured “learning paths” with targeted reference reading and small practice projects.

A practical approach:

1. Start with platform overviews
   • First build a mental map of the Windows app platform so individual APIs make sense.
   • Use:
     • “The essentials of Windows app development” overview: concepts, frameworks, and tooling in one place.
     • The “Core concepts” and “Get started with WinUI” sections to understand how Windows SDK, Windows App SDK, WinRT, and classic Win32 fit together.
   • This gives context before diving into low-level APIs like Direct2D or UCRT.
2. Use guided sections instead of raw PDF cover-to-cover
   • Instead of reading PDFs linearly, navigate by topic:
     • For app development in general: use the “Develop” hub for Windows apps, which organizes docs into Features, Platform, API reference, and Tutorials.
     • For Win32 UI and UX: use “Getting Started Developing User Interfaces for Windows Applications” and then the linked Windows User Experience Interaction Guidelines.
   • Treat each section as a module: read the overview, skim subtopics, then go deep only where needed.
3. Follow tutorials with code, not just text
   • For concepts like drawing, windowing, or interop, use the Tutorials sections and build the sample projects step by step.
   • Recommended flows:
     • From the Windows apps introduction page, go to Tutorials (for example, WinUI 3 desktop tutorials) and build at least one end-to-end app.
     • For UWP or game-related graphics, use “Develop apps” → “UWP app features” and “Develop games” → “Getting started with game development” to find scenario-based guides.
   • Reading plus implementing a small sample is far more effective than reading long reference PDFs.
4. Use API reference as a lookup tool, not a book
   • When encountering an unfamiliar type or function (e.g., a Direct2D interface or Win32 function):
     • Look it up in the Windows apps API reference or Windows UWP namespaces.
     • Read only:
       • The summary (what it does and when to use it).
       • Parameter descriptions.
       • A minimal example.
   • Avoid trying to “learn” the entire API surface; instead, learn patterns and look up details as needed.
5. Organize learning by scenario, not by library For example:
   • “Draw 2D graphics in a window” → search for Direct2D or graphics tutorials, then follow those.
   • “Build a desktop app with modern UI” → start from WinUI 3 tutorials and modernization docs.
   • “Access files, networking, or storage” → use “Develop apps” → UWP app features or the equivalent for your chosen framework. This keeps reading focused on solving a concrete problem, which improves understanding.
6. Combine design and implementation docs
   • For UI work, pair:
     • Design guidance (Fluent Design, layout, navigation, accessibility) from the Design and Guidelines sections.
     • Implementation docs from Develop and platform-specific sections.
   • This helps understand not just “how” to call APIs, but “why” certain patterns are recommended.
7. Use the glossary and conceptual pages to clarify terminology
   • When encountering unfamiliar platform terms (UWP, unpackaged app, WebView2, etc.), use the Windows developer glossary.
   • This prevents confusion when reading deeper technical docs.
8. Suggested “reading technique” pattern for each topic For a new topic like Direct2D or Win32 UI:
   1. Find the overview/concept page for that technology.
   2. Skim the “What is it?” and “When to use it?” sections.
   3. Do one official tutorial or sample end-to-end.
   4. While coding, open API reference pages only for the functions/types actually used.
   5. After finishing, skim related sections (performance tips, best practices, advanced features) to see what else exists.
9. Use samples and best-practices pages as “maps”
   • From the Windows apps introduction page, use:
     • Samples and resources: browse sample apps and code snippets and open them in an IDE.
     • Help and guidance / best-practices: read these when unsure about architecture, packaging, or deployment.
   • Samples show idiomatic usage of APIs, which is often more valuable than reading every paragraph of reference text.
10. Keep sessions short and goal-driven

• Instead of long, exhausting PDF sessions, define a small goal per session:
  • “Create a window and draw a rectangle with Direct2D.”
  • “Handle a button click in a WinUI 3 app.”
• Use docs only to support that goal, then stop. Over time, this builds real understanding without burnout.

In summary: start from the Windows app development essentials and Develop hubs, use tutorials and samples as the primary learning path, treat API reference as a lookup tool, and organize reading around concrete tasks rather than reading PDFs sequentially.

References:

• Develop Windows apps overview
• The essentials of Windows app development
• Start coding
• Windows developer glossary
• Getting Started Developing User Interfaces for Windows Applications
• Microsoft Learn content and resource types