Since you haven't finished the Mozart, why not finish? Also, by the way, a good piano can guide you to the next step in what to play. Why not get one?
a good piano is indeed an inspiration for practicing longer and playing better, but I doubt that even the finest instrument can assist with selecting repertoire.
I wonder if you meant to say "a good piano teacher." In my experience a good piano is indeed an inspiration for practicing longer and playing better, but I doubt that even the finest instrument can assist with selecting repertoire.
avoid 'easy' versions like the plague, v, they're good when you're learning but can cause probs if you get to the 'real' versions.