Exam

You can aim for any college because most of the colleges have a decent weightage to CAT score. But you should keep one thing in mind that you don't have any advantage from your acads so you should work a little more harder than others to get a top college. That's it.

If you have completed your class 12th from the present college, then you can leave your present college. The college will provide you Leaving Certificate Character Certificate Mark sheet etc. These certificates are needed while applying for admission in other colleges.

The eligibility criteria of M.A. Actuarial Economics of MSE are given below. Eligibility: Any graduate of a recognized University with a minimum of 55% marks for the General category, 50% for OBC Non-Creamy Layer, and 45% for SC/ST/PWD candidates and had studied Mathematics or its equivalent at plus two levels. Entrance exam: CUCET
So from above you have to apply and appear in the CUCET exam.