Hey, I'm from Australia too, I'm in SE QLD! Well could you tell me what they are currently being housed in and what you are doing to keep them warm? Also, what are the things you really need to know about or you're struggling with? I don't really know how much knowledge you have of chickens but here's the basics.
The most important things in chick care are shelter, warmth, food and water.
Until about 6 weeks old, they will NEED warmth at all times. When I had my 6 baby chicks I had a heat lamp positioned over their brooder which would be left on all day and night. Warmth is very important, you'll also have to watch and observe to make sure they're not too hot or cold.
As for the brooder, look up into google images "brooder ideas for chicks". The most important thing when making or buying a brooder is that it is well-ventilated yet keeps out draughts and keeps warmth. You can line the bottom with newspaper and shavings over top. Just make sure there are no slippery surfaces, as chicks can be prone to spraddle-leg, and that they're not eating their bedding. Keep the brooder inside your house or garage.
For food, until they'e 6 weeks old you can buy a pack of chick starter crumble. They're like pellets for older chickens but mashed into small pieces and most of the time medicated. This will be all they need until 6 weeks where you can introduce greens like lettuce, grass etc.
For water, you will need to buy a small shallow hopper as a container or bowl can be dangerous, and believe it or not chicks can drown.
Also make sure they're held daily but not squeezed or ever under stress. You want to get your chickens used to being handled at a young age as they will be pets. When they're chicks it's the easiest time to tame them. I held my chickens all the time when they were babies and they grew up to be soooo friendly. They'll follow you around too and you'll be able to hand-feed them treats when they're older.
Don't let them free range unattended outside yet until they're older. You don't want them being preyed on by a cat, bird, fox etc. or becoming too cold. At 6 weeks they will have grown in small feathers and will have lost most of their down and this is the best time to let them out for the first time.
Chicks are so rewarding, feel free to ask me any questions, I really hope your chicks go well, I know how much joy they brought to my life and now I'm obsessed with chickens (not sure if this is a good thing but...)
I'm also so sorry if this sounded like a lecture
and Welcome To BYC! Good luck with your new chicks! You've gotten some good advice above on taking care of them.
