>>11551453>In order to use it, one must first learn its commands and theory, right?Yes. And I am not telling you not to use this book, but what I am telling you that 95% of learning will be done by you writing stuff on your computer and running into problems.
>Like what?Any person who writes in LaTeX will pick up some particular habits, concerning document structures and packages.
Personally I prefer the koma script classes and tools around it, as opposed to the Standart/AMS tools he uses.
Similarly for the bibliography he uses one particular tool, while I might prefer another.
But thinking about it that seems to be the case for every book and flipping through the PDF it seems quite decent.
But, I think you should avoid at any cost "just reading it". The first few chapters will teach you the basics and after that you should really try to do what you want and use the book as a reference, since there is A LOT in it you might not need or care about (like doing presentations).
>>11551488The overleaf things are usually pretty good, although almost always rather shallow. And stack overflow is, as always, hit or miss, either the question will be answered very well and in detail or it will be a useless mess.