Imo it’s better that you wait, you could try installing vanilla Arch in a vm and distrohop once you’re ready, if PopOS is suiting all your needs imo there’s no reason to get Arch on bare metal (A vm for fun and learning would be satisfying ig), on a side note, getting the proprietary NVIDIA driver to run is very simple in vanilla Arch (like a 4 steps or so)
That really doesn’t sound right, I have a 930m and it ran GTA V on med-high 720p (on Windows though…), the game itself is ps3/x360 era so you probably have a problem with the driver or maybe double check it’s running on dGPU