I have an 8 gig RPi4 (OS is Dietpi) with a 16 terabyte HDD for storage. No issues at all…super fast and reliable. There are great FOSS apps on F-Droid covering just about anything you’d need…the official app, cookbook, bookmarks, notes, news, etc. If you’re using an HDD instead of an SSD, just make sure you have a dedicated power supply for the HDD.

Just an FYI that you can definitely download shows/movies to any device via Jellyfin - just did so on my tablet yesterday…jump ship!!

They manage to make even the most mundane things fun for kids. My four year old loves doing the Morse code and braille activities…such a great app with so much to do!