Good deal. I can just go buy a cheap one online and it should work for a starter, correct? <-- Noob to speedrunning

Hi all!

Simple question: I'm looking into getting into speedrunning. For simplicity, say I'll only be looking into SNES games. For doing this, should I go out and buy a SNES controller to hook up to my PC?

It may sound silly, but I've heard of X Speedrunner running say, N64 games with a GC controller, etc. etc. I just know I don't want to use my keyboard! Thanks!