Emacs Lisp Function Guide?

Question

I have been using Emacs for more than three years now but it still takes me days to write even small functions in Lisp. I\'ve looked through GNU Emacs Lisp Reference Manual but

Answer 1

In order to understand what's on, quite often it's useful having a look at the source code.

http://repo.or.cz/w/elbb.git/blob/HEAD:/code/Go-to-Emacs-Lisp-Definition.el