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- Docker: You can practice on your main computer before complicating things with networking.
- How to set up a reverse proxy: DNS, certificates, etc. I recommend Caddy.
- Backups: If you use Docker Volumes, make sure you back those up too and test the backups.
To self-host, you do not need to know how to code.
Stalwart is gaining momentum. I haven’t used it, but it’s worth a look. https://stalw.art/