I did this with ESPHome on an ESP8266 connected to an IR led for some rope lights that had IR control. The hard part is finding the codes for each control, but there’s a surprising amount of info out there.

You can connect an SSD to these boards and boot from that instead of an SD card. Definitely the way to go especially considering SSDs dont really cost more than SD cards.

I have no familiarity with Yunohost but this is just a matter of separating your services. Have one container with the *arrs, qbit, glutun, and VPN and a separate container with Immich and Nextcloud. I personally use Proxmox with Portainer to run tne containers, but you may be able to just run Portainer on your OS to accomplish the same thing.

You’ll only connect to people who do have port forwarding setup, but nobody else.

That’s obvious by examining all the geriatrics running the country who were alive prior to the implementation of these bans.

So pretty much personal aircraft only not commercial.