Which state and which place do you belong to? As for B.Com, the application process depends upon the college you will apply to and the University it is affiliated to. Check which colleges near your place offer B.com and call them up. They will tell you the procedure. As for online, I wouldn't advise doing any online course unless you have compulsions or are working.

I would advice that you look into professional courses along with B.Com like Chartered accountacy or cost accountancy to build your qualifications a bit more.

Write back if you have more doubts.