Class 12-Commerce

You can pursue professional courses like:-
Chartered Accountancy
Company Secretaries
Accounting Technician Course
Or you can choose Academic Studies like:-
M.Com
MBA
Also you can start preparing for Govt. Competitive Exams
All the best

You can only join a domestic airlines after 12th as for international airlines you need to be a graduate.

If you have done your 12th with maths/business, maths/computer application as one of the subjects and in English you have scored 45% or above that you can pursue BCA. After BCA you should think for MCA to complete the journey before joining job in IT domain.

You are eligible to do BBA / MBA in specialisation such as Sales & Marketing, HR, SCM, Travel & Transportation, Healthcare etc.But you will have to compulsory courses on Maths & Statistics in all branches of BBA and MBA.

There are numerous opportunities. If you like Maths, you can go for a Chartered Accountancy course. You can go for B. Com, BA, or BAF (Bachelors of Accountancy and Finance) course. If interested in management, you can also opt for BBA. All courses have ample scope.

Just not an entrepreneur
You can do much more.
I appreciate your idea to become an entrepreneur.
Firstly, I would strongly recommend you to become a graduate. You can so Graduation in BBA (Entrepreneurship & Family Business) offered by various colleges.
After that you can go for Accounting Technician Course to boost your career as an entrepreneur as this course will enable you to take the load of Taxation and Accounting Of your Business by yourself and not depending on others.
It is also advisable that in the third year of your graduation, you can pursue ATC saving your one year.
Got any further queries? Please comment.

Hi Ayush,
For a commerce student with mathematics, here are some popular options:
B.Com
BA Economics
CA
CS
CFA
BA - LLB
BBA
BCA
Bachelors in Accounting and Finance
BMS
Bachelor in Financial market
Actuarial Science
Insurance
Mass Communication and Journalism
Banking and Financial Services etc.
It won't be possible to list out details of all courses here, you must do some research yourself. Study as per your interest and aptitude. Visit college websites for admission requirements. Research on the career outcomes of the programs and see which meets your own career plans the most. Take a psychometric test too.

You can do graduation in whichever subject that suits you the best as per your interests and simultaneously you can pursue CS i.e. company secretary.