Hello there. Hope you are doing good. I would like to tell you that yes it is possible to do B.A LLB after open schooling. The eligibility criteria for pursuing BA.LLB states that you should have atleast 45% in class XII from a recognized board.

The top colleges which offers BA.LLB are as follows :-

1. National Law School of India university, Bangalore
2. National Law University, New Delhi
3. Symbiosis Law School, Pune
4. ICFAI Law School, Hyderabad

For more list of top colleges and details regarding the colleges, I am sharing a link with you which you can refer.

https://law.careers360.com/colleges/list-of-ba-llb-colleges-in-india

I hope you found this answer helpful. Good luck for your future.