While jellyfin itself is very simple, you might run in to problems if you want to use it while not on your home network. For this you’re either wanna use a VPN (or tailscale) or use something like nginx to give your server a web address, while you get this for free if you use plex.

Giving yourself a public address might be easier for the person trying to access jellyfin, but it it comes with a bunch of security considerations and you probably (definetly) want to do some research on the inns and outs of that. I would recommend tailscale but either way it’s gonna be some extra fiddling, unless you already have something like that set up.

I think that linux has a couple of things that might help it grow outside its traditional niche that it hasn’t in the past. Proton has been a major step forward in to the gaming scene. A lot of people are very unhappy about windows 11. The EU in particular is also investing in ways to get out from under American techs thumb due to the geopolitical landscape.

I don’t have too high expectations personally but who knows.

Another option if you don’t have a family is to use DLNA for streaming to the TV, most TV’s have native support for that and you can just set up your computer to work as a DLNA server.

I do use a media server but I could probably get away with just syncthing to sync my computer and phone, it would probably be easier even. Of course, if you have more than 2tband you want it all at your fingertips then a media server is probably the right call.