Do people learn languages from official documentation? Throughout my career I've spent thousands of dollars on books from O'Reilly, Wrox, Apress, and others to

Do people learn languages from official documentation? Throughout my career I've spent thousands of dollars on books from O'Reilly, Wrox, Apress, and others to learn every iteration of the Microsoft web stack (from 1997 to present) as well as JavaScript. With JS the books tend to be out of date before they are published so it's typically more useful to follow a blog or YouTube series to get up to speed on things like React or Vue or (whatever is new now... I'm out of the loop on this). I think the only official documentation I've ever used was for libraries (React, Flutter) and not the languages themselves. Regarding books: if I would have realized 20 years ago that I could have gotten most of those books from the public library I could have saved a lot of money. Lots of public libraries offer access to eBook services like O'Reilly's Safari books online... but the wealth of info on YouTube right now is staggering. You could go from zero to near PhD level CompSci just on the videos and material being published by major universities.