As for any piece, you should always examine and study the score before actually playing the piece. First things first, you should go on the Internet, listen to some DESCENT RECORDINGS by some great artists, such as Gould, Horowitz, Rubinstein, Ashkenazy, Argerich, etc. NOT by a student! And definitely not Lang Lang, Yundi Li, or Yuja Wang!
When I study pieces on my own, I usually read through a score and play through the whole piece on my own. That way, I get it learned quickly. The first time playing through is usually rough, but the second time is much easier.
When working on pieces, always work on them hands separately and slowly! This is like taking apart a broken car or computer, or doing a surgery. You are cutting the piece up into tiny bits to analyze it and understand it, both technically and musically. Always remember to keep a loose wrist and arm with FIRM FINGERS!!!!!