Hey Garima.

As you are already pursuing your graduation and you want to pursue law in the future, you should take entrance tests for the 3 year LLB courses.

Some of the most sought after entrances and institutes are-

DU LLB for Delhi University

MHCET for GLC Mumbai, ILS Pune and other colleges in Maharashtra

Symbiosis Law School

PU LLB Panjab University

BHU LLB Banaras Hindu University

LSAT for Jindal Global Law school, IIT Kharagpur etc.

Best of luck!