Glad to help, yes that is a perfect example of how you could use this to your benefit. Much easier to just tell people to enable VPN (tailscale) and navigate to an easy to remember URL.
I’m somewhere in the middle, I do cybersecurity professionally so i work a lot with technical stuff but my hobbies are much deeper in it so theres a lot of stuff i don’t know. But, thanks to these communities i was able to learn how to do a lot of things and have now levelled up into doing the research on my own and trying to give back :)
In your dream scenario, is that each family member would be hosting immich/jellyfin on their pi zero? Or is the pi zero somehow routing traffic for them back to your server for jellyfin and immich?
Once the port is open, you should be able to access it via the tailscale IP just as you would locally on your network