Personally… Id spin up a Ubuntu desktop instance for Jellyfin and Sonarr. I went through a few different operating systems before I went back to Ubuntu and…it just works. Lots of documentation on installing those services that way. Jellyfin is very happy behind Sonarr… I’d stay away from Windows for any kind of selfhosting because I don’t trust them
I had issues getting hardware acceleration working on server…but, I guess that isn’t a issue on a mini pc
Also with them being new Desktop offers a lot of tools and easier to navigate. However I do a minimal install not a full one