Tell me, how much Bach have you played? The answer decides if you can play it. My Maestro that I studied with would not let me play a thing by Chopin, till I had played all Bach's inventions, and all preludes and Fugues from well tempered clavier. THEN he let me play mazurkas, waltzs, and nocturnes by Chopin.
It is needed to note, that my teacher graduated from a European Conservatory. In Italy. He performs world wide, you might have heard of him, His name is Stephen Vaglica. If you want to play good Chopin, you must play good Bach...