Free DNS from Claudflare with adult and malware content filtering

It won't block everything because some sites (like reddit) have mixed content (which is a shame), but otherwise it's great.

You can setup it manually by setting the DNS to 1.1.1.3 or use the Warp app https://one.one.one.one/

Personally I use Pihole for greater control, but you need to host it on your own server.