By the sounds of it all you need to do is keep your mouth shut in the surf



Do you have a car?
If not you will have to learn in the surf real quick or make some really good friends and shout lots of beer

You can ride at dog beach, but it aint going to be any good in most wind directions, plus if something goes wrong you will end up in the shipping channel.
If it is flat water you are after
You could try up in behind the break wall over at stockton it will be flatter depending on the swell, but still not considered a flat water spot.
Otherwise there is a couple of places down around swansea that will offer flat water with our sea breeze.
Also up at nelsons bay there are some flat water spots if you like a drive.