The LaTeX SE is also very useful. The official documentation of LaTeX and especially of third party packages, is often hard to read and it’s hard to find what you’re looking for. You can end up on the documentation on Overleaf,but they don’t go I to depth too much.
Eh, I hate its culture, but I regularly find useful excel or regex answers on StackExchange.
The LaTeX SE is also very useful. The official documentation of LaTeX and especially of third party packages, is often hard to read and it’s hard to find what you’re looking for. You can end up on the documentation on Overleaf,but they don’t go I to depth too much.