As above, don't get too bothered by apparent lack of progress at this stage. It happens to almost everyone. One day it'll click. I agree entirely with your instructor's "just fly the aeroplane" approach. It's very difficult - perhaps impossible - to TELL people how to land an aeroplane. You can only give them the tools to get the aircraft into a position where their judgement will get it on to the ground safely.
Are you in a side-by-side or a tandem aircraft? If the former, my only tip, from 11 years of instructing, is that, for reasons that don't seem to have been definitively established, the person in the left hand seat will usually think they are pointing the aircraft down the runway when in fact it's pointing significantly to the left and requires substantial inputs of right rudder. My experience of teaching circuits is that short final consists of saying "right rudder....right rudder.....right rudder". The student doesn't believe it because his eyes tell him no such thing is required - until he's over the grass.
NS