did you receive the AOR from sydney? if yes, then the next process is explained in the AOR itself. you have to collect your full supporting documentation and submit with your full application to your local visa office before the deadline (120 days from the date of AOR).
Now the second stage is very important and very crucial for deciding to grant you a visa or not. So please go through the link below and make sure u read between lines before finalizing the documents you would send to the local CHC.