Hi,
Very good idea. As you have done PG then you should go for 3 year LLB. You can check information about the Law Entrance Exams which will pave your way towards taking admission in a good law college.

Some good institutes which offer 3 year llb programmes are:

Faculty of Law, DU

Symbiosis Law College, Pune

Jindal Global Law School, Sonipat

Government Law College, Mumbai

ILS Law College, Pune
GLC Mumbai
BHU Law College, Benaras

University College of Law, Osmania University, Hyderabad

Rajiv Gandhi School of Intellectual Property Law, Indian Institute of Technology, Kharagpur

Maharishi Dayanand Law College, Jaipur

Chandigarh University, Chandigarh

I hope it helps!