Comment by Magicrafter13

My setup is a self hosted GitLab. From there, in most of my repos I setup repo mirroring (basically it just does its own SSH-based git push whenever I push commits to it) to GitHub, GitLab, and Codeberg.

All of these are free (if you ignore electricity cost of hosting your own git server), and each one is a backup of sorts.

I don't necessarily recommend starting with GitLab though unless you want advanced CI capabilities, but you're already used to GitHub so you should consider self hosted gitea, which uses the same Actions syntax and even has some interoperability with its action modules I think.

But yeah, my recommendation is just to push to as many (free) git hosts as you can. Why not take advantage of free code storage if it's available. Plus if any one host goes down you can still retrieve your code from the others.