I like your schema. I’ve used something similar. My hosts have always been sci-fi space/time ships/stations, user accounts are characters from or Captain’s of said vessels. Over the years I’ve had a TARDIS, Serenity, Moya, Out of Bands II, Galactica, Millennium Falcon, Rocinante, etc. It’s usually whatever I happen to be discovering or binging at the time I setup the machine. For nearly a decade the TARDIS was my server/NAS because it was bigger on the inside that survived through several generations of smaller devices like laptops and raspberry Pi’s named after smaller lighter vessels like Serenity and Rocinante.
It’s a lot easier to setup and get non-techy family to join. Setting up Jellyfin is easy until you want access outside your LAN. Setting up TLS or a VPN is a hassle I don’t want unless there is no other option. Plex has features I (and my family) use that jellyfin doesn’t support by default yet. Last I checked syncing of files for offline viewing in the official app wasn’t very good yet. Plex has a bunch of ad supported live streams baked in that aren’t too bad. There is a “How It’s Made” channel, a Mythbusters channel, and Top Gear channel. PlexAmp isn’t perfect, but it’s better than any of the Jellyfin options I’ve seen.