The biggest single tip I can give you is move your hands around on the boom in the bottom turn and cutback.
Think about a bottom turn as being a jibe. Move your back hand back along the boom. For the cut move your back hand back towards your harness lines.
I can think of no better place to learn to wave sail than Gerroa. It's only 2 hours drive from the centre of Sydney.
It's way too often knee to waist high and soft breaking waves are the ideal place to start your wavesailing experience.
Since you are off to WA, Coro's is your spot.
There is a fair chance you'll see Ben Severne there.
Model your bottom turn on his.
His bottom turns are a stand out especially in those conditions.
His cutbacks are none too shabby either.
Plenty of other great sailors there as well