Aus-USA journeyer

So once Sydney gets your file, they will email you, asking you to complete DS 160, and pay for visa fees. ( Mine is K1, you must have another form to fill out). The you need to scan and email Sydney the payment receipt and DS 160 confirmation page. ( If you are CR1, would it be DS 260? Sorry I am not sure about this form, you better check with others). 
 
Once you send them those two, Sydney will reply back with your appointment time. In the meantime, I suggest you arrange your medical done, and get police check certificate. 

Thank you! That is super helpful

For what it's worth, NVC notified me of our "case complete" via email on April 10th, 2017....I received the interview date email on April 15th, 2017. 
Good luck.....