A semester of programming is more than you need. The hardest part would be installing the OS on the raspberry pi. https://pi-hole.net/

I set one up. My IT skills begin and end with being a millennial that had to troubleshoot what I wanted to get to work before App stores.

You'll be fine in general searching "Pihole setup (insert OS here)". Some minor troubleshooting was necessary in my case, could be an ID10T issue though.

Yes setting up a Pi-Hole should be pretty doable for someone like you. I can't recomend a specific tutorial off the top of my head, but there should be plenty to find.

You mainly need a pi running raspbian or a pc running some debian based distro.

Anyone can set them up, it’s just running an app

You can alternatively install Adguard too which will happily sit in a Docker container on a regular server if you're aware of how to do that.

None if you block them.

Then we switch from DNS and look to good old firewall blocks.

Update to say device is 'offline' unless it can reach these IPs? Local NAT to direct the traffic to a basic ping box.

Game keeps being played until someone quits.

Firebog.net Ticked lists as a collective, over 10^6 domains long now. Firebog have lists organised by how likely it is to impact general browsing, ticked being least likely (basically do you want to be black listing or white listing).