Import & Export Management Counselling

There's no technical way to enter the field. But while in MBA, you can focus on international business and trade relations subjects. You could try interning at a port operations. This would be a great help for you in terms of all the over understanding of trade and challenges related to it. You could even try a sales profile in an industry where you need to understand all the different kinds of companies and their products, like an insurance industry. Good luck!

As you have not mentioned your location, I might not be able to guide you appropriately. But you can click on the link below and find the course as per your location:
https://goo.gl/Eh2VXG

After B.Com, there are many options that you can look forward to. Some of them include M.Com, CA, ICWAI, MBA, etc.