Since it's OBS, you'll probably want to learn Linux and set it up for gaming. I had done that, and would be happy to help however I can on thay front, and might even recommend some games that work (one of them is not CoD Warzone).
Discussion
I'm just going to be putting it on the streaming rig for now, but yeah I saw that CoD doesn't work for Linux so I won't be switching up the main rig any time soon because of that (or at least until I get sick of CoD again lol)