If you're a Linux person, just skip all the other non-sense and create a systemd-networkd file. It's by far the simplest solution I've used, and doesn't require goofy unit files to start/stop/restart via wg tool.

https://www.freedesktop.org/software/systemd/man/systemd.net...

Then choose your firewall of choice to setup NAT and forwarding. I used firewalld, but not sure I'd recommend it. It's just the first solution I got working.