If you try to browse to the tailscale website does it work?
If it does you could setup tailscale with an exit node at your house and tunnel your connection that way? Everything would then be coming from your home internet. I have had good success with tailscale being able to punch a hole through some pretty filtered firewalls.
I'm currently using osmc on raspberry pi 3s with the jellyfin kodi add-on installed. Works like a charm and can also install other video addons as well. Its been rock solid and you can airplay and stream from your phone. Been running this replacement for a year.