

Yup, the official driver is your best option for gaming. No experience with fedora here. I think they use wayland instead of X11 by default, right? I know that wayland had a tough time with Nvidia gpus. No idea if anything has changed in the last two years.
Not quite. You can use your free apple ID for temporary self-signing. But this cert is only valid for 7 days and can sign up to 3 apps simultaneously before you have to update the cert.