I have Plex, Radarr, Sonarr, Overseerr etc running in Docker containers, but have never found a good guide on how to access these (safely) from outside. I resort to connecting to a server running VNC. I’ve tried nginx but didn’t understand it, also tried Cloudflare (ditto). Is there a good, easy to understand guide on how to do this?
Assuming you don’t want to expose these services directly to the internet (I don’t recommend it) then you want to set up a VPN to connect back to your home network. Wireguard or OpenVPN are the most commonly used. As far as guides that will depend where/how you want to run it.