Hi and welcome to the breeze.
Brighton and Sandgate are well known areas for kiters and safe for beginners on an outgoing, mid or low tide as there is heaps of beach. You can also touch the bottom for a long way out as well.
Heaps of people around to help out if you need it.

If you are unsure of anything or haven't kited in those areas yet just rock up and ask a few people what you need to be wary of as each location has a couple of rocky reefs. Best to stay away from these.