Futo has grants for open source and sounds close to what you need.

I run Linux mint with Nvidia card and no problems gaming, basically every game I tried worked (don’t forget to check protonDB and see how to get some games running, but most work right away).

As for dual booting, you need to worry about Microsoft doing evil and trashing the boot loader after an update. Windows is a mess, it spies on you, it boots your computer at 3 am to do updates, and it reboots when your doing work you haven’t saved. So happy I switched. (I do have an old MacBook that has macOS and windows for the few things that need windows or Mac such as modding tools (hardware flashing tools and such but I only use it a few times a year).