Hate to say it but I agree with bilb, you might need to stick with windows. I tried Linux on a hybrid graphics laptop a few years ago and it was a disaster. I did get a handful of games to work but nothing that would actually push the graphics card. It was more trouble than it was worth.
I know it doesn’t help you, but on desktop with AMD it’s been smooth sailing .
For a heavy duty gaming PC that you want to last many years without having to touch hardware again, I’d recommend 32GB RAM and most definitely go nvme SSD drives (not SATA). No spinning rust drives unless you have a specific use case for media or archive storage.
As far as the cpu and video card, unless you plan to heavily get into ray tracing in games or play with (gag) “AI”, AMD will be great for both.
I’d recommend Mint or PopOS for a starter distribution. I do not recommend Bazzite to newbies because an immutable distro adds another level of learning concepts you don’t need at the beginning.