Lots of choices for sure. I haven’t built a PC in years but I’d start with looking at the requirements for the Minecraft & Jellyfin server, maybe shoot a bit higher to future-proof the build, then browse PC part picker builds to find combos that have worked well for others?

Best of luck to you.

Can I ask how far you live from work? I’ve always tried to keep my commute distance short because I hated the time I wasted driving. Eventually I sold my car for a bike and have been much happier.

Sell your cars and buy bikes: give up gasoline.