Nit: git is simple AND powerful.

Simple isn't the same as easy.

git is simple in the same way Lisp is simple, or Go is simple. git was hacked together in a couple weekends precisely because it's so incredibly simple. There are a few guides where you can write a git in a weekend (e.g. https://wyag.thb.lt/).

Really understanding git is really difficult, though.

A few years after you build a git, you'll get git. I've met only a handful of developers who really grok git, deeply, but it's a journey well worth taking.

The good news is that the surface understanding of git, from having built one, is enough to safely work with the complex commands that trip up most programmers. That's worth a weekend in itself.