Company Secretary

Well, it's not impossible though, it's difficult. BBA is not like normal B.Com. You'll be having a lot presentations and assignments. CS is a really nice option and you should always go for it but it's tough. So, it basically depends on your strengths whether you'll be able to manage both the things simultaneously.

Company Secretary (CS) is a professional qualification accepted in corporate world because of regulatory requirements. CS can act as both an independent professional and an employee and CA profession is a professionally and financially more rewarding career in comparison to BBA. Therefore, I will recommend CS over BBA.

First, complete your CS. You can opt for MBA afterward.

The company secretary is a good course, but it's a long-term course and can't be completed easily. You can pursue CMA (US). CMA is same as CS but it can be completed in the short period of time.

One way is to graduate from economics Honors and after that you can do 2-3 years course in law.

You should clear class 12th to join the course. But, by the end of the course, you should have completed your graduation as well.

No one can tell you about this. You have to go by your own interest. Although, both are almost related to working in corporates. MBA will get you a job after 2 years. So, research about it nicely and go by your interest.