One online update covers every roll
Update your enrolment online, free, at aec.gov.au/enrol/update-my-details. The AEC matches your details, so most people upload no documents. This one update covers federal, state and local rolls. Nothing separate for your state or council.
Your plan puts the electoral roll at the top, as your "Start here" card. It takes about two minutes. It shows how every card works: open it, follow it, mark it done.