if you want to learn it, learn it. it doesn't matter if it's too difficult for you, by learning pieces to the best of your ability you'll always develop. if it is too tough for you to bring off a good performance of it, make sure you easier pieces too which are well inside your ability level. that way you'll stretch yourself technically but also be able to express yourself musically.
i always believe people should learn what inspires them, otherwise it's not good learning.