Awesome thanks! Please consider a step by step self-host installation guide for non-technical people. I’m confortable with the command line but know nothing about docker.

Do you need a YT account or it’s like Freetube?

LineageOS, good enough to degoogle and if it’s possible for you to use F-Droid-only apps you are out of the surveillance machinery (with the exception of the TSP if you use a SIM card) and it’s a huge step from stock Android in terms of privacy.

Check Posteo. Working great for me since I left gmail.