Why not OT at curtin? Just curious as to why you seem so eager to move interstate, seeing as it costs a great deal of money and all. (but the Curtin course switcher program is also quite competitive. If I were you I'd just try for GAMSAT, you'd probably do quite well in it if your ATAR is so high.) Like all the others here have said, please don't choose a medical science degree because a) it's hard to get a good GPA, with it being a hard course, b) the environment is insanely competitive, and c) there are next to zero stable job prospects in that field. OT is a good career choice. Maybe consider that over Medical Sciences.