I just started using some docker containers I found on Docker Hub designed for DB backups (e.g. prodrigestivill/postgres-backup-local) to automatically dump from the databases into a set folder, which is included in the restic backup. I know you could come up with scripts but this way, I could easily copy the compose code to other containers with different databases (and different passwords etc).
I would highly discourage getting a fire stick, they’ve locked it down so much its just annoying. Yes, you can get there but found it much easier on android tv boxes, specifically the Xiaomi Mii TV ones. Which one you get probably depends on whether you need 4K and/or dolby