I used pi-hole until I got pfSense set up. Then I migrated to pfBlockerNG, which has a lot of the same DNS blocking capabilities built in. You may want to check it out.

As I also mentioned in another comment above, you might find some value in py-hole, which is a pi-hole implemented in python.

You can just apt-install it.

Its pre-alpha, but it might work for you...

https://github.com/time4tea-net/py-hole