B.Sc

B.Sc hons can be done in physics, chemistry, bio chemistry, bioinformatics, maths, botany, zoology, Biotechnology, physiotherapy, occupational therapy etc. All subjects have their own benefits so u need to choose which u like and handle easily for next three years. Jobs will entirely depend on Your skills and abilities to utilize the subject as the job market keeps changing.

in india biochemistry will not give u instant job it is research oriented but pharma can give.but finally give weightage to Your interest

yeah thats good
look for B.S as well as it is research oriented graduation

BCA is a better choice.

I suggest you complete a course in clinical operations You can later on start working as CRC in hospital site. Getting in to pv or CDM will have your age as a limiting factor.

u can do in following colleges
university of mumbai
st xaviers college mumbai
ramnarain ruia college mumbai
christ college bengaluru
symbiosis college pune

You can complete B.sc in a college who has permission to provide you an authenticate graduate certificate. after that, you can apply in Australia.