Why would you be forced to use your ISP router? Anyways, you can probably configure that. Look up the model, find out the login URL and default user/pass, and see if you can log in and make changes.

I would suggest using Piholes regardless of your routing strategy. They can help improve the web browsing experience by improving load times, can capture stuff missed by browser ad blocks, and work as an adblocker for devices that don’t have browsers, like Apps and smart tvs.

If you must use your ISP’s ONT, have it set to bridge mode. And then use whatever router you’re comfortable administrating. Open WRT is perfectly good for this.

The benefits of bridge mode are that your routing device has the public IP address. And controls everything. Some of the more evil ISPs won’t let you set bridge mode on their device unless you open a support ticket it’s worth it to do so.

Was using pihole.

Repurposed pihole as Batoceta retro gaming station.

Set my router to use Ad-guard (others are NextDNS, RethinkDNS, cloudflare DNS family, mullvad).