Hi Marisa, Thanks for your reply.
I think the main concern is that if we are going to move across the other side of the world we are all in and don't want to be another family that is heart broken, having to come back.
The plan now is to wait until end of 2019, see if I'm able to get superior English in the interim, if not take a 482 Visa if the opportunity if it comes round again and apply for PR while in Australia as Areyousure mentioned!