The comments give some great advice on what to self host, but my advice to you before you start spinning up a million services is to DOCUMENT EVERYTHING.

Seriously, document as you go and you will thank yourself later. Document niche commands you found online that worked, docker compose files, IP addresses/hostnames, where you put that random config file.

There are some great self hosted wiki and documentation products out there, start with that, then build the fun stuff!