I think medium is the best place to learn new stuff! Do you guys think the same?

No

Depends on what the guy write

Definitely not. Some posts are quite good but the majority is 'garbage'. Like only things that are half true, are against common practice, some even highly questionable.

Nope. The best place to learn new stuff is to build something people use.

No, it is worse y than wikipedia.

Medium is a blog and contains the writer opinion and some summary of a very complete document.

What is worse the writers don't cite sources often.

However, if the writer is some sort of authority in the topic, then it might get interesting.

@Fradow that is the best way to start indeed.
Just throw yourself into it, you will have questions and will have to research a lot.
Can be very frustrating, but rewarding.

The bad side is you will have to take what you learned, and get yourself into a course or book to ground most of it.

Medium has a lot of great content but it also has a lot of really crappy content. If you're looking strictly to learn a new skill, you might try something along the lines of Pluralsight or Skillshare.