I have been using emacs since about 2017. I used Spacemacs for a time before fully switching to Doom-Emacs sometime in 2018. Much thanks to Dxnn for showing me spacemacs in the first place.
When I first started I had no idea what I was doing. Elisp seemed incomprehensible (I had yet to learn Scheme or Clojure). Elisp is /still/ a bit of a mystery for me. I'm quite happy tinkering from time to time, but have yet to need an full breadth of knowledge of the language.
Still, I am often discovering new things I can do!
If you are learning emacs and want to know the history and how to get around vanilla emacs, I'd recommend Mastering Emacs by Mickey Petersen.