[Meseki]

I don't think there are any simpler key setups you can use if you want any significant amount of skill to transfer when/if you get a controller, though there may be some I don't know that tend to have less key lock-ups.
Not doing well on easy songs at first is normal, even if you have experience with other rhythm games. 2 years ago, I was failing Rislim Beginner on Delight Delight Reduplication, but as you can see now on my signature, I've cleared most of the 11s and 10 of the 12s.