you'll be much better off flying to north qld or some islands than waiting for some dodgy gusty winter winds around nsw. you'd be suprised where $300 can get you these days.
If your keen for a holiday in that 2 months, Cocos is a great place to learn you can get free equipment hire if your a beginner. You'll come back rockingt in just 2 weeks. www.kitesurfcocosislands.com.au