Hi,
When I say I can understand how you're feeling I mean it. Our situation is similar although we got here end of Nov so not been here very long but the 'dream' of moving out here and having the 'better' life is exactly that, a dream! I do like it here but I miss my friends and family so much and so far I've found Sydney to be let's just say unfriendly. My husband and I have decided we will see how our eldest daughter settles into school and give it a year at least, that's the advice our family and friends have given us too and if we feel the same in a year and haven't built any friendships we'll go home. I don't want to rush home though because we're the same as you, we left our jobs, no house, no cars etc so we'd be starting again and that's a daunting aspect. I really feel for you but I'd give it at least a year.
If you want to chat msg me and we can moan together lol
Zoe