Yeah for sure. I’m no expert by any means, but I can talk through what I did.
I used the instructions directly from their code repository: github.com/pi-hole/pi-hole/#one-step-automated-in… (I used option 1, the automated install). I did this on an old RPi2B that I had laying around.
After I set up the pi, I got its MAC address. I used this to set a static IP address in my router settings. This is important to make sure the pi keeps the same IP at all times. Then, also in my router settings, I set the DNS server to be the pi’s static IP address.
After all that was done, I just plugged the pi into a dedicated power supply and rebooted the router.