|A course is best - if you don't understand something, then a human can rephrase and try explaining a different way. Do the homework yourself as you learn best by doing, not copy'n'pasting!
The next best is a book: they deal with the material in a structured way, introducing all the language and framework elements in a way so they build on each other. Do all the tests and exercises as you go along - that helps to reinforce what you are learning. Wrox, Addison Wesley, and Microsoft Press all do good ones.
From here on down, it's generally poor: grabbing a compiler and trying things is a really bad way to learn anything useful, but is much better than watching YouTube tutorials - most of which are created by people who don't know how to make a video, don't know how to teach, and more often than not can't code either. Remember that "Likes" and "Subscribes" are currency: they make money so you get a lot of real crap there. There are good ones I'm sure, but they are so swamped under a massive pile of money-making rubbish that they are pretty much impossible to find.
Good luck - but don't expect to become an expert overnight - there is no short cut here!
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
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