Adding my two cents here, although 1729’s response was great!
1. What if I'm the kind of person who can do anything if I really want to (I feel like I'm a mixture of both the 'mathematical/scientific' as well as the 'creative/free-willed' personality type), should I go with the prerequisites for Medicine (chem, english, 1 or 2 maths/LOTE subjects, maybe bio or physics)?
Definitely go for subjects you like first and foremost, but also factor in prerequisites, as said above. Most of the time, you’ll find that you’ll need English (or equivalent English subject e.g. Literature) as a prereq, with Methods and Chem and/or Physics to be able to apply for the most courses. (Funnily enough, Biology is very rarely a prerequisite on its own.) A lot of the creative/ arts/ social science courses just need English as a prerequisite.
3. Which subjects are prerequisites for Medicine school?
Already answered above but just letting you know, a lot of medicine-hopeful students often try for interstate medicine courses, and not just Monash Uni to increase their chances of getting in. This is something you won’t need to care about until you’re in Year 12 though.
4. What if I'm going to a uni that's outside of Australia? Does Atar still matter?
Depends on where you’re going, but majority of the time, the International Baccalaureate (IB) is the preferred program instead of VCE for people who want to study abroad, as IB is recognised overseas while ATAR isn’t always. If your plan is to study in the US, then you’d also want to look at taking the SATs and probably bump up those extracurriculars.
5. Do you guys recommend doing a LOTE that's ur second language (at home) or something else? Like my new school offers French , which I haven't learnt before, but should I pick it over Chinese because it scales higher AND has more mild competition (plus I found out from research that French is a good LOTE for doctors)?
Do NOT pick via scaling. Pick based on whether you like Chinese or French more. (Doing a subject you don’t like in VCE will be like nails to a chalkboard.) Personally, I didn’t like studying my second language much, and did Japanese instead (which I’d taken since Year 7) simply because I liked that better.
If you’re not sure, you can always take French in Year 9 and see whether you like it. If you find out you don’t, just switch to Chinese or opt out next semester/ year. (Otherwise, you can go to a weekend school like VSL to continue Chinese if you or your parents are pretty adamant you want to keep it, or vice versa e.g. take French or another language you like outside of school.) From there, you can always choose to continue to higher year levels or not. Years 7-10 are all great years to explore your interests and experiment to find what you like best! Have some fun now and try a whole range of subjects; you’ll regret it if you don’t and you’ll learn more general skills that will help you for life.
As for French being good for doctors, it depends on where you want to go and what programs you’re hoping to join e.g. MSF, which primarily goes to French-speaking countries, but I would be wary of the fluency required.