One of the joys of not being on the bleeding edge and using older, well established software is exemplified by my slow exploration of #emacs. In this case it’s a book which is 11 years old but it is a really well written, clear guide and whilst bits are outdated the fundamentals, which is what I am after, are still relevant.
https://www.oreilly.com/library/view/learning-gnu-emacs/0596006489/