Yes, that would be cool.

Are you trying to do dadaism?

Many routers have an option to login to a VPN. Then all traffic that goes over that router to the internet goes over the VPN. Theoretically something like that should also be possible with a Linux server if the server is local. With this setup you shouldn’t need to configure the VPN on your local devices.

A Pizza with the radius z and the height a has the volume V= Pi×z×z×a