B.Sc

She can do it once she finishes her B.Sc. Whichever college she wants to join all she needed is above 50% in graduation as the graduate degree will be provided to her later, so the college will ask for the last year's mark sheet and the course completion certificate of UG degree that would be enough.

It is better to go with B.Tech rather B.Sc. You can pursue B.Sc. If your Diploma is equivalent to 12th standard or you are already a 12th standard passed with pre-requisites. It is not possible to pursue through distance education.
Regards.

Hi Shivam,
You can apply for data Science/data analyst jobs or you can pursue your career even in actuarial Science.

Various colleges has different date, but generally forms are given from first week of June onwards.