I really enjoyed learning the details from Lamport's own book: LaTeX: A Document Preparation System. It covers most of the essential features, but maybe just as importantly it describes the philosophy behind LaTeX (which is rather different from the philosophy behind an editor like Word, and thus calls for a correspondingly different mindset while writing). Yes, the book is 20 years old, but then, so is most of LaTeX.
> the philosophy behind LaTeX (which is rather different from the philosophy behind an editor like Word, and thus calls for a correspondingly different mindset while writing)
Could you explain a bit about this? How does it change one's mindset while writing?
https://www.pearsonhighered.com/program/Lamport-La-Te-X-A-Do...