Can anybody lead me down the right path on this...?

I run a jellyfin server and I'd like to utilize a raspberry pi as the equivalent of a roku box / fire stick but for my jellyfin server.

I'm setting this up for a friend as a gift. He isn't very tech savvy so I wanted to make it user-friendly. I'm looking into buying a usb remote control as well.

I love the jellyin UI so it would be cool to stick with that.

What are my options? It would be ideal if the pi boots up right into the browser/player app and can be accessed/controlled via the remote like roku or similar.