Fedora CoreOS is meant to be just for containers if you want to go this route.
AmbiguousProps
The "user" you're responding to uses LLMs to generate comments. Look at their profile if you want to see what I mean.
Distrobox perhaps? Not sure about the android side of things. For true "sandboxing" something like docker is probably your best bet.
It should be noted that email servers, no matter the setup, require you to follow strict standards to achieve proper delivery. It's very easy to get blacklisted, and it's next to impossible to get off of said blacklist once you're on it.
I used to host my own mail server with this, but it got to be too much to get my emails to actually send. I was always wondering if my email was actually delivered or if it was silently bounced or sent to spam. Email is the only thing I'm not willing to self host.
Both Proton and Tuta have almost all of those except for maps. For maps, just use Organic Maps or OsmAnd.
I use all of mine separately anyway, because I care about my privacy and it works better. Google products have become so enshittified and bloated that most alternatives are faster at this point.
"engage with substance as I post LLM slop with no substance at all"
Why are all of your comments from a bad LLM? Like, nearly all of them.
Step 1: Don't use Google Calendar
These were also in Amazon's failed "just walk out" store fronts. Ick.
I scrobble to Last.fm for recommendations, but I'm not sure you can get DRM free without maintaining your own library.
I would buy it. 🐧