AS YOU HAVE INTEREST IN MANAGEMENT TRY TO GET YOUR MATHS STRONG IN CLASS XII AND ONCE YOU GET GOOD PERCENTAGE TRY TO TAKE ADMISSION IN GOOD MANAGEMENT COLLEGE AND PURSUE YOUR BBA.

YOU CAN ALSO OPT SOME PRIVATE COLLEGES THOSE HAVE GOOD PLACEMENTS AND FACULT.

ALL THE BEST

Yes you can do bba from any college even if you are from science background.there are such no normsbya by college if you want to do bba after science stream in 10+ 2

Many students do btech,bca and then do MBA

You can also opt for intergraded five years course of BBA+ MBA also

Good luck