@catloaf@monkeyman512 If I can give one advice : learn docker first, rent a vps. If you want to move to physical self host it will force you to test how to deploy everything from one host to another which is a critical step after being able to have things just working.
The mail suite I use is mailcow-dockerized and it's awesome.
@catloaf@monkeyman512 well i might disagree on this.
I started selfhost a couple of services for private use with a pi2 some time ago, and after gaining experience, I finally selfhost almost everything I need : cloud, photos, backups, website, media streaming etc. Including a mail server, on a low voltage unit.
Okay the mail server was a bit trickier to setup but works fine now for 3 years. I'm not get spammed or mark as spam, even without static IP.
@hono4kami
One of the best documentation I've encountered so far:
https://borgbackup.readthedocs.io/en/stable/