I was in the same position as you last year! Had no idea, I had looked at everything pretty much but midway through the year i completely eliminated med/dent/health science. Only at the end i considered biomed again, but by then i had pretty much made up my mind that i would do commerce/engineering at Monash. However, after talking to relatives who are in engineering and work in banking i decided to go with commerce at Melbourne! My advice, research everything then eliminate the ones that you have a iffy feeling about i.e. for med the ideology of it sounds great to me, but the process of getting there greatly put me off - i had to talk to some teachers who all agreed that perhaps it wasn't suited to me if i didn't have the passion to continue studying and all that jazz for a further 10-15 years. I had a look at law, but quickly realised it isnt for me too. At this point i was getting worried that there is nothing left for me to do lol mainly because i thought i was a math/science kid and end up in science.
Once i crossed off half the list, I looked further into the courses that were left and did some more soul searching

I was really reluctant to do spesh at the end of year 11 but my coordinator forcefully encouraged me to do it and I've never looked back! Spesh was actually one of my favourite subjects at school surprisingly and now math has become something I'm passionate about and find immensely intriguing. In VCE it felt like a chore, but now I'm doing it because I want to rather than have to and it's opened an entirely new perspective. I had somewhat of an interest in math in VCE but it was not as strong as it is now. Which lead me to actuarial studies - ever since talking to some of my teachers about it and they thought it would suit me very well (suprising lol) I researched it heaps and tried to know everything about it. Frankly, I shat my pants. It sounds incredibly difficult, but I've decided I'm up for the challenge and it still is my goal!

I also considered IB too

Funnily enough I still have some desire to do it, but all the rumours are true! When you get into uni you will meet a lot of people and i mean A LOT. I've met a few people who got into IB and quit after 6-12months just because it's so demanding! One of them is my tutor this semester, now completing a PhD.
I NEVER intended to do commerce, I always said to myself (back in year 11 and before) that I would never do business stuff I was always certain that I would end up doing something health related if not science i.e. chemistry and biology. Funny how making one decision can have such an impact, I'll always be grateful for the advice my teachers gave me and i'm glad I was able to repay their faith in me at the end of the year!
My best advice, find out what you're passionate about but of course you have to consider other factors such as job opportunities etc but nevertheless if you're desire is to pursue that then go for it! Also don't underestimate the experience and knowledge your teachers have, they will know people and will have a general idea about most things, pester them for information if they have it, every little bit helps. The net is good for finding information but make sure it is credible and don't buy into some of the crap you read on forums - most of the time people are trolling or a hater.
1. Commerce at melbourne for ez 12 hour weeks for 3 years.
2. Aquire job, proceed to gain experience.
3. Pursue further education ie. MBA or JD
4. Become next Harvey Specter?
12 hour weeks, but if you do a math stream instead of the QM stream to satisfy the compulsory math units then expect to have 14-16hours and expect to have a pretty spread out timetable! You'll have lectures/classes everyday which sucks, but it's possible to push everything into 3 days but economics lectures. (this might change when/if you do it, but atm it is a pain in the ass)