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dunno
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dunno
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If you're tight on budget (and who isn't), an old Android phone makes a passable server - especially one that can run Nura (used to be called PostmarketOS) - check https://wiki.nura.eco/wiki/Devices
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Looks good to me. Be careful with email, it's hard (yet possible) to get right. Here's my answer to someone asking what everybody's self-hosting: https://piefed.social/comment/12336670
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Yes you can. Or FreeBSD, like others mentioned, or OpenBSD or Haiku OS or Windows - as long as it's able to start the application you want to host. Some applications run on anything - check nginx. The question is what's good to self-host on - the answer is "whatever gives you least headache". I'm using NixOS, for its powerful text-based configuration system (store the whole OS config in Git), atomic upgrades and rollbacks. As for systemd - it's a tool. I use it, it suits me fine. If it raises your cortisol, exercise your ability to choose - find a distro without systemd - but also remember that systemd is also a legit choice. many people (like me) are completely fine with running a systemd-based distro.
Also check out a comment I once wrote to someone asking how to get started:
https://piefed.social/comment/11341527