DO NOT come to UniMelb if you have the option to go to Monash. They are roughly as prestigious as the other.
DO NOT get baited by the Unimelb model. What you will soon find out is that you will spend 80% of your subjects slots doing subjects that are not even related to your major. To name a few, Wine tasting, gender studies, music and health. You may think to yourself, I could just do the useful subjects but you will soon realize that those "useful" subjects are are scarce and insanely hard (because it is a core subject of another major). They will suck up so much of your time to the point you wonder why you came to uni at all. And you MUST do at least 4 of these because it will "expand your knowledge". Of course it's a lie but there is no way around this.
You will also soon find out that what you actually learn from uni is minimum and you have to go to Masters to learn what you actually are interested about.
TLDR: Go to Monash. Pick a major NOW. Don't hesitate like I did and get baited by Unimelb.
If not, I wish you good luck because you will need it.