What you describe doesnt really make sense so ill suggest what i think you really want;
You want your vps to be the wireguard server, the local PC connects as a client this “proxies” your connection so torrent swarms see the IP of your vps.
If you want port forwarding it gets a bit complicated because you need to forward the vps port over wireguard, but this is optional so you dont have to worry if you can’t figure it out.
Caddy doesn’t really seem relevant unless you want to have a domain name that forwards to your home network.
What you describe doesnt really make sense so ill suggest what i think you really want;
You want your vps to be the wireguard server, the local PC connects as a client this “proxies” your connection so torrent swarms see the IP of your vps.
If you want port forwarding it gets a bit complicated because you need to forward the vps port over wireguard, but this is optional so you dont have to worry if you can’t figure it out.
Caddy doesn’t really seem relevant unless you want to have a domain name that forwards to your home network.