The only way for you to know that CIC received your app is if you had signature or tracking option via whatever method you sent your documents. It takes about 2-3 months by which time the office in Sydney will determine if your documents provided are all complete and good and will wait in a pile to be assigned to a CO. You will receive AoR at which point usually 3-5 days on you can then check your application on ECAS, as a fellow Feb applicant we should expect something around second or third week of April.