Part Time

It's a regular course and admission starts after class12th exams are over.

Hi,
Kindly visit the link. https://www.shiksha.com/mba/course/master-of-business-administration-mba-nshm-knowledge-campus-Kolkata-tollygunge-89479
Good luck.

LLB is a full-time course and cannot be done part-time.

What do you want to pursue and what are your plans now?

Yes you can do that. But it's a lengthy process. First get approval from the university you wish to transfer into. Second get approval from your university. Then proceed with the instructions given by the university.

If you are in a good city where a better coaching institute is available then go for it otherwise self study is the best key. There is no mean to waste money in the junk classes then.

Yes, you can do MBA from distance becay there is no age limit for pursuing MBA. After completing MBA, you will get more scope.

No, it is not possible to switch courses.
https://www.shiksha.com/mba/course/post-graduate-diploma-in-business-management-sydenham-institute-of-management-studies-research-and-entrepreneurship-education-churchgate-mumbai-164803

Minimum 50% in graduation is required. Dates shall be announced soon for the commencement of the programme. Classes shall be held on weekends, fee structure should be Rs. 50,000 for one year and the last date for the form submission can be known by contacting the college admission committee.