Hey
Congrats on your bio mark!
My VCE subjects were very similar (even including doing bio a year early) so if you want VCE advice I can probably also help you with that
Here is some information about the major
Looking at the
course handbook (this is where you get ultra-detailed information about the course) it doesn't seem like much maths is required.
Hopefully someone more familiar with this will be able to share their perspective too
In terms of stress, I would warn you that the career you are pursuing is a highly stressful one. There are high rates of suicide compared to other careers, and you will likely find it significantly more stressful than uni. I don't say this to try and deter you from your dream; if this is what you're set on doing, then do it
but I thought I should warn you
Good luck - and definitely feel free to post & ask questions
PS. you might want to look at some of the stuff
here and
here