i am a Linux noob. i installed debian KDE wayland with an Nvidia card just like you.

i experienced similar issues. i couldn’t set my refresh rate above 60Hz, my screen was really dim and stuttering, and video playback was lagging. worst of all my Minecraft framerate was abysmal! (<20fps default settings)

i read the dang wiki and got everything running smoothly in an afternoon

it’s ready as fuck