need help installing wireguard properly

i am trying to add a vpn from my router to my pi. i created wireguard server using dietpi software list. followed the steps and now when i click wg i see public key private key which is hidden and my listening port followed by peer/allowed ips. im assuming its running how can i test that the router is passing through the vpn before it reaches my devices like my phone or perhaps another raspberry pi? considering the dietpi elimates u to configure certain things and its click and run im not sure what my next step should be. im attemoting to do multi hop vpns btw. any feedback is greatly appreciated

Here is a great tutorial on how to get it setup and working.

I hope this helps