I agree with what was said. There are a number of Chopin pieces that are not advance and very approachable by a young to intermediate level player. It depends on what stage your note reading, technical, and musical skills are. Most student who have been well taught can handle a Chopin mazurka or prelude after a year or two of dedicated study. It that is you and you want o move from intermediate to advance, I would increase you understanding of keyboard geography through scales, arpeggios, some exercises, finger dexterity, tension free, and musical playing. To play Chopin ballades and etudes well you must be proficient and be able to execute these with ease and good dexterity. Play the easier repertoire with as much beauty, care for phrase endings and starts, singing through your instrument when playing legato, exaggerate dynamics, and consider extra musical sources for making decisions. You will encounter many sections that need to played cantabile and with rubato and it will be good to start there. Once you can do this I think that is a great starting point to start to tackle the harder of chopins work and even then expect it it to take some time to perfect. Best advice I can give you is find a good, qualified teacher, practice consistently, be patient yet hard working and diligent and then Chopin will be a piece of cake.