Accounting

You can do MBA after BBA from any good university in your area. You like calculating subject so you can also prepare for charted accounting (CA). You can become chartered accountant in future.

There are rare chances of you getting admitted to VIT with this rank. But, give a try till last round, if you are ready to take a risk. Because, if there are not sufficient numbers of admissions, in the last round anything can happen, i.e., any person with any rank can get admission. I'm telling you this, because this has happened last year. All the best.

There are rare chances of you getting admitted to VIT with these marks in CET and JEE mains. But, you can try for VIIT. You may get an admission. All the best.

Can you please explain your question to get a clear answer?

First of all, you have good experience so with your job, you can do part time MBA for better salary. After completing your MBA, you can switch company for better salary with work experience.

Yes, you can.
Here is the eligibility for GDCA:
Age must be between 22 to 31 years.
This age limit had no relaxation for the quota students.
Graduation degree from government recognised colleges/universities.

The specialisation subjects for B.Com are many, you can choose any one of them, it can be banking and finance, computer application, cost work accounting, business ethics, and entrepreneurship development. These are some of the specialisation subjects which are there in B.Com.