I've recently fallen very deeply in love with this piece, and would very much like to learn to play it, but I'm concerned that it's technically too demanding. I would say the most difficult piece I have learned is his B-flat minor scherzo, which I can play well but not excellently. I know that the Sonata would be a huge undertaking, but is it likely that I'll find it completely out of my reach? The fourth movement in particular sounds quite daunting.