How is it any different to viewing a shared Plex library to the end user?

They have a reverse proxy setup, so their family or friends would simply enter that url into a jellyfin client and sign in.

So yeah, I think an average tech illiterate person can do that

Kinda in a lull with homelabbing ATM, but here I’ve got my router in a custom 3d printed mini rack with 3d printed patch panel, and a couple of old NUCs. Only thing I really use day-to-day is a NUC connected to an amp so I can use the amp as a Spotify connect client

I’m happy with my TP-Link Omada router. Very capable, super easy to use, feature packed. More than capable for your needs and gives you room to grow to setup more advanced networking