Ok so first of all you need to check the NBN website to see what technology your home will be serviced with, just head to the NBNCo website and at the top just enter your address and click check home. It will then tell you what technology you'll be serviced with and when it will be ready for service.
If you home is ready for service then you get choose an ISP or contact your current ISP to move across to the NBN.
Should look like this
If you home is ready for service then you get choose an ISP or contact your current ISP to move across to the NBN.
Should look like this