I'm neither a teacher nor a professional, but just wanna to share my silly opinions.As you like this piece a lot, you should tackle this piece. It's only about of time: whether now (very slowly and progressively) or later (after sharpening your skills further). Compared to the pieces you mentioned, and if you haven't played Ravel or Debussy much, then there's a relatively steep learning curve.You can tackle the easier pieces of Ravel (or Debussy, or Faure?!), before you go ahead with Jeau d'eau. BTW, Debussy's Images I & II aren't easy either.If you are good at scales, arppegios, etc., and if you really want a waste of "water", then you may wish to try Liszt's Les Jeux d’eau à la Villa d’Este first. Again, not an easy piece either. It's just because I suspect you have more exposures on classical & romantic periods.Good luck!