Sachu, nursing is actually not a bad degree, my sis had a very low enter when she finish her yr12 back in 2003 (in the 60s) and she decide that she do nursing at RMIT which is in melbourne. I have to admit, she did not regret her decision at all b/c so far now she the one in the family that earn the most excluding overtime or nightshift. Trust the benefits are realli there, she got a job straight away at one of the major hospital in melbourne (Monash medical center) and they even provide free studies in expertise areas + the training. She also gets to boss the docs around (these are only the interns and the residents only... not the registrar or consultants hehe).
It realli doesn't matter which uni u come out from especially in health areas...... everyone will end of in a job as long as there's demand for it which in this case nursing is one of the most jobs that is in demand. That's the reason why government put in the most contribution ($$$) in nursing compared to other courses. There are many specialize areas u can get into and one of the reason ones would be nurse practitioner although that would take some more studying and training in later career but it's almost like doctors (well not the specialise ones)
As for the fact that you plan to study bachelor of medical science or science .... trust me it's quite boring because you're expect to do labs which is the reason why i decided not to pursue a career after i finish my science degree and the fact that there's a chance where u may not be able to transfer and end up being a science graduate (touch wood).
If u ask me, i would suggest that go into nursing first and you coul;d practically get into any nursing course at any uni with ur ATAR, then if u dun like it , apply to transfer into other courses like oral health etc. But if u were not able to trasnfer in the future at least u will end up in a respectable field with good income and employment..... and u'll prob end up enjoying nursing as they deal more with disease and drugs.
I'm speaking this from personal experience as i did not do that well in high school as well (i got 78.5 enter which is similar to ATAR in melbourne), and i dun have a lot of choices which is why i did science at monash and ending up finishing it. However i got so scared that i wouldn't achieve anything in life because i don't want be a researcher and which means i have to do PHD. Both my younger sis were well ahead in life.... one is in nursing and the other is doing dietetics. So i end up taking radiography which i did not regret b/c it has good employment opportunities as well but obviously not as good as nursing in terms of demands. But if i can turn back the clock would have done nursing with my ENTER (back in my days nursing is meant for girls especially for asians!!) and prob do radiography after that (only if nursing doesn't suit me).
BTW ur ATAR is pretty high...... initially i thought u were in the range of 60s-70s from the way u post. LOL.