Hello Yashpal

It is very much possible to do the same even if you are not from commerce background.

Now since you might not understand the basics of accountancy and other relevant subjects, I would suggest you to first arrange yourself a tutor who could help you learn the basic fundamentals.

Maths is relatively easy to tackle since it is a known subject. Law will be taught from the beginning only and you would be on no disadvantage regarding these two subjects.

However, you gotta work hard for economics and accounts portion. Your coaching peers will be ahead of you in that already. Don't panic if it takes you more time to grasp things.