Any free ride kite will work great. Maybe more important to try find some last yer new kite on sale or any new kite.

You do not want to find out that bladder leaks, or you pulley got broken because previous owner...

I'm newbie but got chance to try some kites.. check this

RPM - interesting kite, massive de power bar travel but kind lack great wind range, med bar pressure
Switchblade - good, epic stability in gusts/high wind. massive de power, just one really good kite
Rebel - gust killer, good low end, really jumps easy & forgiving. Evo is Rebel with 4 lines, bit less hang time but better height
Obsession (RRD) - fast, fast kite. not so stable in gusts, loops great, great low end.

Look and read about bar pressure. Being 55kg chick you want something with low bar pressure no matter performance.
Good luck

I had an RPM as a beginner, not particularly happy with it but wasn't the worst either. I'm not going to go in to the exact brands or models that you should get, since there are so many different ones and all have their preference.

In the very beginning any freeride kite will do, so as long as it's promoted as "beginner friendly" or "easy relaunch" etc. it should be fine. I would look for a newer kite as it will probably last you longer. It only takes a few bad moves from the owner (such as storing the kite improperly or crashing it hard a few times too many) for problems to occur (leaking bladder/valves, small holes in canopy that can later rip, fragile lines and so on) so each year and the number of owners really counts.

In terms of size I would go for a 9m if I were you. That's the equivalent of a 12m for a 70-80kg guy so if you see a lot of average size guys riding 11-13m (which is most of the windy days in Botany bay) that means a 9m would be good for you. However, when you're out on a 9m, watch out if the wind picks up and you see the other guys going in and switching down to 8-10m, since that would mean that you would have to go on a 6-7m to not get overpowered. So just head down to the beach, if you see average size guys riding 10-12m (or smaller guys or girls riding 9m) that means that you're good to go =)

Also, remember to try to keep a good distance away from solid objects (rock groins, trees, jettys, watercraft signs etc.) and other riders.

Don't ask for kite advice here. Talk to your trainer/shop first, as most could offer you 2nd hand gear (if they have any) and not try and sell you new. But expect to pay at least $500 for a decent kite.

Good choice!