CLAT PG is the entrance exam if you wish to pursue LLM. The eligibility is you should have passed the three year integrated LLB or equivalent LLB degree from recognised university.
As you have completed B Com you can apply yo CLAT UG and pursue LLB first and then LLM
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Hope this helps
the eligibility criteria for clat pg is Applicants must have to obtain at least 55 percent marks in his/her qualifying L.L.B degree.
Qualifying Percentage of Marks – 55 % Marks for (General/OBC/Specially Abled Person category).
for sc/st candidates marks criteria is 50%.
hope it would help.