How to set up Level up spell with N?

Ok, so I am a rare species of left-handed players. I recently changed my qwer to uiop. Now heres the issue. I want to have n become my quick level up button. For example, n+u, n+i, etc. But I am not able to do that because it wont let me set up a whole array of commands and wilil only let me use N, how do I fix this?