Writing Emacs Lispλ︎
You do not need to learn how to write Emacs Lisp to use thousands of commands that Spacemacs already provides.
If you do want to do some extensive customisation, beyond creating a simple layer, then here are some useful resources to get started.
Example: writing an interactive gameλ︎
{% youtube %} https://youtu.be/gk39mp8Vy4M?autoplay=1loop=1