How good are you? I used to be really good in my younger years using basic mice and keyboards, pre wireless days in counter strike and more. Unless you are really good or a pro, the cost to performance on the upper end stuff isn't worth it. You will still get defeated by the people who have no life.
While I do have a gaming keyboard, I use my logitech marathon keyboard and mx master 3s (prior was 2s and prior was the marathon mouse).
Mouse pads. I prefer cloth, probably bc I grew up on it and it can slow the mouse down.
To be blatantly honest with my own opinion, most of it is for the streaming world and rgb should go away. I am only trying to point out that to many, this is a fad trend and not really a worthy endeavor but to each their own.