Hi there
There is actually no "best key setting", they differ from person to person.
But most key setups are very similiar, just the actual key position is different for most people.
my setup for example is (German keyboard layout):
4K: SD KL
5k: SD Space KL (There are some ppl who use the 3rd key with space, and some others without space).
6k: ASD KLÖ
7K: ASD Space KLÖ
8k usually has 2 different kinds of setup a 7+1k setup and a 8k setup. I'm not quite sure, but i think most o!m players use a 7+1k setup.
The difference is, that 7+1k will be handled as a 7k setup, just with another special key on the outer left/right side, that special key will usually be used less often than the rest.
8k will be handled as a symmetrical key setup, where no key get's considerd as a special key, so they all will be used the same way.
7k+1: Shift ASD Space JKL
8K: ASDF JKLÖ
So basically Asymmetrical key setups will usually be played with a "special key" in the middle, and almost everyone uses the space bar to trigger that one.
I think this should already be enough for keys, try to concentrate on 4k-7k at the beginning, most ppl don't even bother with 8k+ and 1-3k.
Btw here is also a
link for a guide, which may help u to improve faster in mania