Yes, that's my question - are you looking to self host more stuff on start9 or a new server? If a new server, are you're using an os similar to start9 which makes handling software/packages easier? If yes, you might want to look at CasaOS. If not, you can get really complicated, but running a bunch of containers is typical and pretty easy with most stuff launched simply with docker compose up -d

Also, just because you can self host, doesn't always mean that you should. A lot of providers offer a great service that have a lot of nice features because they have dedicated staff (devs and support) compared to trying to figure things out with the help of community.