The only thing about ur peripherals that would actually hold you back is if ur mouse/keyboard actually don't work properly. Like unless ur keyboard doesn't respond half the time or your mouse doesn't register input properly u can get to mg.

So long as u get 60fps u should be able to git gud. People below mg have sloth-like reactions anyways and so does half of mg as well.

tbh if ur playing in nova, you don't need a mic, just reactions faster than a sloth. Maybe in mg you need to be able to communicate properly, but if you can hard carry then tell ur mates to feed u info and you will carry.

tl;dr if you want to get to mg you could probably get there with an Atari keypad and joystick if you want to.