The r/typescript community's most upvoted practical advice: take an existing JavaScript project, rename files to .ts, enable strict mode, and fix the errors. This hands-on method builds real intuition faster than any course.
Best way to learn is by doing. You can start off simple, assuming you already know JS. Convert an existing JS project to TS and gradually fix bug when you add TS.
Turn on strict mode and force yourself to use it. Go to definitions of library functions and such you don't understand, try to understand them.
The official TypeScript docs are the most consistently recommended starting point across Reddit's r/typescript community. Free, comprehensive, and maintained by Microsoft, it covers everything from basics to advanced type manipulation.
Matt Pocock's Total TypeScript is the community's go-to recommendation for developers who want to go beyond basics. It offers free beginner courses plus premium workshops that r/typescript users consistently call the best paid TS content available.
Codecademy's structured, browser-based TypeScript and JavaScript courses are ideal for beginners who want guided lessons with instant feedback. The free tier covers core concepts, and the platform's gamified progress system keeps you motivated.
freeCodeCamp offers thousands of hours of free coding content including TypeScript, with a beginner's guide that Reddit users cite alongside the official docs. PCMag rates it 4.0 Excellent, comparable quality to paid platforms at zero cost.