Kolkata

Yes, you can pursue M.Com.
Some colleges in Kolkata are:
1) University of Calcutta
2) Goenka College of Commerce and Business Administration
3) The Bhawanipur Educational Society College
4) Shri Shikshayatan College
5) Ananda Mohan College
6) Scottish Church College
7) Prafulla Chandra College
8) Asutosh College
9) Bhairab Ganguly College
10) Derozio Memorial College
I will suggest you that with M.Com do some certificate course which can help you in developing your skills such as
1) Tally
2) Certificate course on forensic investigation
3) NCFM ( NSE certification in financial markets)
4) SAP FICO
5) Certificate course on EXIM
6) Digital Marketing
Else, prepare for banking exams, insolvency professional exams. And if you are thinking about earning while learning and want to seek practical knowledge then go for internship in the field you are interested in. Moreover, it will help you in identifying your interest in a particular branch/ field.
All the best.

Heritage Institute of Technology comes under top colleges in West Bengal. CSE is one of the best branch of HIT, Kolkata. The placement scenario here is quite good. Heritage has an upper hand in terms of placement. The placements were pretty fine in last two years. Companies like TCS, mass recruits with an avg package of 3.75 - 4.00 LPA. Some students have also got a package of 6-7 LPA. Apart from on-campus recruits, students have also got a package of 20-22 LPA, off-campus. Some companies like Infosys, Wipro Tech, Xplorsoft also visits the campus. This year Hp is going to visit. Although companies like Hp, do not recruit many students but this gives students an opportunity to excel. The placement percentage is around 80-85% in HITK. There are also few core branch companies like Borch, Godrej, Philips, etc that visits the campus. But they do not recruit many students. A good amount of students go for higher studies.
I would say, the placement scenario is extremely good. But it is fine.