Hey.
If you have already competed a graduate degree or a post graduate degree and now want to pursue law, then you can go for a 3 year LLB course. LLB course of a duration of 3 years is specially for people who wish to pursue law after graduation/ PG degree. There are various top colleges for admission in 3 year Law colleges. Each college has it's own admissiom procedure and entrances.
Here is a list of law entrances for 3 year LLB course

- DU LLB - Delhi University

MH CET- GLC mumbai, ILS Pune and other colleges in Maharashtra

SLAT- Symbiosis Law school

PU LLB- Panjab University, Chandigarh 

LSAT- Jindal global Law school, IIT Kharagpur and other private law colleges

BHU LLB- Banaras Hindu University

BVP LLB- Bharatiya Vidyapeeth

TS LAWCET Etc

Best of luck!