I got it running on the router. I didn’t need to change my individual devices. Login into your router. Under basic setting click DNS. There click on Manual. Enter the static IP address of your raspberry Pi.
Over a year later. Did you get Pi Hole Running? I'm trying to do the same. I was able to change the DNS and it worked for approx. 1 hour and then everything stopped connecting. Pi Hole is running but I am unable to connect to the internet. Retried a ...