The downfall of many self taught pianists is that they expect to play this piece at full speed in a couple months time. It took me 1 year before I performed this piece in public for the first time. Aim for accuracy in notes and rhythm.
What use is an NBA player that misses their shots?
Doesn't matter how fast you run, if you're not accurate and score any points.
Doesn't matter how fast you play the piece, if you're missing all the notes.
Doesn't matter how accurate your shot is if you can only score them at the free throw line.
Doesn't matter how many notes you play correctly if you don't play them on time.