So we'll have a president like the USA? No.

No. They have a completely different system, where the President has lots of control over the government.

An Aussie republic will keep our current parliamentary democracy with a Prime Minister, but we’ll have the advantage of one of our own citizens as head of state to replace the King or Queen of England and the Governor-General.

This is the kind of republic that works well in countries like Germany, Ireland and India today.