M.Com

If you want to get specialization in marketing than it is advisable to go for MBA. If you are unable to go for regular course than you can pursue MBA in marketing from IGNOU. It is a very well established brand name and is internationally renowned University. The course material is also of international standards. For further details kindly visit the website of the University.
I hope this would suffice. All the best and God bless you.

Hello Rishav,
The following are the top colleges for m. Com in Mumbai:
1)Narsee Monjee College of Commerce and Economics
2)Sydenham College of Commerce & Economics
3)Rizvi Educational Complex
4)H.R. College of Commerce & Economics
5)Mithibai College
6)Tolani College Of Commerce
7)K J Somaiya College Of Arts And Commerce
8)Hinduja College of Commerce
9)Pillai College of Arts, Commerce and Science, Navi Mumbai

Hello! Choose the course which interests you more. And also ensure to pursue it only from a good and reputed college, as it will lead to good placements and better learning exposure overall.

MBA in Finance:
In the recent years, finance has become one of the most sought after specializations that focuses on management accounting and control, the Indian capital and money market, banking, privatization and international finance. After MBA in finance, one can look for various options in banks, financial consultancies and financial institutions. One can also work in areas like consumer and investment banking, institutional finance, merchant banking, corporate finance and international finance.
You can refer the below link for colleges offering MBA in Finance:
https://www.shiksha.com/mba/colleges/mba-in-finance-colleges-india

No, there is no compulsion.
You have many other options such as CA, ICWA, MBA, etc.

It is actually the best course and you could definitely pursue it without any restrictions.

MBA+NET has more validity since there are large number of management colleges in our country as compared to pure commerce colleges. It's good to choose MBA+NET.