He can also be the hacker known as Fortran.

This doesn’t address your issue specifically because I haven’t tried personally to use wireguard on my home server. Personally however I’ve been using Tailscale to connect to my home network remotely for DNS redirects through Pihole and to connect to my self-hosted services. I found Tailscale pretty easy to setup. If you can’t get Wireguard figured out you might give it a look as an alternative.