Not sure how many services can be hosted in that way and remain useful. But it’s an interesting idea overall! For myself, I could run a Git forge on local PC. Since I’m the only user, and I just keep my scripts there, it is fine not to run 24/7.

You have taken a lot of useful steps. May I suggest email aliases? Using same email address on many services is too easy to track

I believe most people who care about privacy don’t trust Gemini or Google in general. So it’s not an issue if you already not using Gemini app. It can be uninstalled (at least for now) even without going alternative ROM way