Personally I would recommend trying to do some of the groundschool before going rather than flying, it is frustrating to be stuck in the classroom if the wx is good as flying is the expensive stuff. Even if you don't actually attend lessons, at least get the books and make sure you have read through them beforehand so you are halfway ready for the exams.
Another tip, don't go now - the wx can be appauling with heavy thunderstorms. Best time is around November (when it is usually horrible here anyway).
