LLB

There is two types of law courses LLB, which is a 3 year course and its eligibility is graduation and BALLB, BBALLB, B.Com LLB, which are of five years duration and its eligibility is 12th with 45%.
Many universities and colleges have either one of the course and a few having both of them.

It depends upon the University, if they allow to do so.
In CNLU, many students in 1st semester, who were studying in BBA to BALLB after University allowed them.
So, you need to talk to your administration if they allow or not.

Please share your educational details.

After pursuing LLB, you can:
1. Start litigation.
2. Join company as a legal officer.
3. A bank as a law officer.
4. Public or govt offices as a Govt. lawyer.
5. Join law firms as an associate.
6. You can join Indian army as JAG.

CS +LLB is definitely a better choice than MBA +LLB.The use of LLB is evident after you complete CS

NMIMS is better than Amity.

You can join companies as a legal adviser.

Please find the link attached below. Go through it properly and you will be able to get all the requisite information. Do well.
http://www.slaw.dauniv.ac.in/

To be honest, your chances of getting through is almost negligible. Please drop a year to prepare again or better join any other course and prepare simultaneously if at all you wanna do law. Good luck!