BBA

Acharya Bangalore B-School is a good option for BBA in terms of infrastructure and knowledge offered.

Kindly visit this link:
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-Mumbai-all/2-2-0-10224-0.

You can definitely go for BBA and MBA. This provides ample of opportunities to explore once you have a degree. A stream does not matter for BBA and MBA but it will be a little bit difficult.

The fee structure (per semester) is between INR 11000 and INR 15000.

No chance at all. First, know where you will get admission to apply for visa. You need not try. You can try admission in New Zealand or UK; you will get it.

If you want to pursue a course related to business studies, BBA is a good option.

https://christuniversity.in/m/management-studies/bachelor-of-business-administration-(bba)/1077
https://christuniversity.in/m/management-studies/bachelor-of-business-administration-(bba)/1081
Check here for the detailed information as selection process is quite complex. But, you have to give exam.

Both are good. If you want to work in a Technical field then do B.Tech or if you can work in any company then do BBA as it will be only 3 years conpared to 4 years B.Tech. But again when you study in B.Tech your knowledge will increase and you will have better chances of getting a good score in CAT.

Hi,
Your 12th marks is good. According to your percentage, yes, you're eligible to get admission in NMIM but the maths is compulsory in 12th to get admission NMIM.
Good luck!