Well, it appears that you're very young right now although you didn't mention anything. At this point, what you can do is keep in touch with the fashion scene through the fashion glossies and newspapers. You should also concentrate on your studies, because a good degree and the ability to express yourself well, comes in handy in any career. Just keep in touch with the fashion trends, so you'd have a first hand knowledge of varying trends. So that when you eventually go to a fashion school you wouldn't have to try hard with the fashion history and all. Most new trends are also formed by tweaking and touching up old trends, so a knowledge of the past fashion trends always helps. You may also get books or read stuff online about the technical side of fashion designing, the way to go about it and all. You will be doing this in fashion school, of course, but if you're so determined to prepare yourself for it already, why not?It'll only make things easier for you there. Then, of course, when you're done studying, you will have to seek a reputable institution of fashion designing and get in to acquaint yourself with all the technicalities and know how of the trade.

 Yes, concentrate in your studies ,but you will definitely need relaxation.So if you really like fashion designing,skecthing some designs would be the best way for you relax.This will also get you started and you can also save those designs for your future career