I think learning Japanese is a good idea. If your school somehow gets a japanese language class, that's good. The easiest way to learn, for me; is to watch LOTS of japanese anime (and try to learn the vocab, of course) and then like Chizuru said, listen to alot of japanese speaking people without japanese. You could probably pick up alot of things from that.
Also, if you wanna teach yourself, you can always learn from internet websites and books!