Hey.
You haven't mentioned the name of any college.
As you have completed BCOM and now want to pursue law you can take admission in a 3 year LLb course. 3 year law courses are for those who have competed graduation and now want to pursue law. Admission procedure in different colleges vary. Most of the top colleges for 3 year law take admissions through their respective entrance tests
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!