How to choose a career after you complete your 12th?
You can continue with commerce, if you are good in accounting subjects and could opt for professional courses like CA or ICWA along with your graduation.
You also have an option of doing BCA (Commerce) if you think you could do better in programming softwares.
Then there are management degrees like BMS or BBA if you are interested to get in to management.
But, these options of BCA or BMS/BBA should be taken only if one is completely focussed on that career, as they are related to a particular field and hence changing the line becomes a bit tougher once you complete graduation. For eg., if you take management, then you cannot come back to accounting.
B.Com is a general course, and after graduation options are open for higher studies in accounting or management, economics, HR etc.,
So, basically it is all about your interest and hence choose wisely.