Career advise

yes, your decision is good.but instead of pursuing cs , opt for ca it will be a better combination and you will have many oppurtunities 

since entrance level examination is exempted for bcom completed students. u have to undergo ipcc and final levels along with articleship.

course will be completed in 3 years

                                                                 or 

 I suggest you for MBA in Finance which is the best option for you at this present scenario. After MBA, you will develop managerial skills and it help you to enhance your career. ICWAI is a course which is more focus on cost of production like you have learned cost effectiveness, cost reduction and many other cost related techniques. It may be possible that you find similarity between ICWA and MBA finance but it will be more refined and you will gain extra knowledge.