Hello vishnu,
Congratulations on completion of your 12th.

There are a lot of courses that you can  get into in the Commerce field. Along with graduation there are a lot of professional courses to choose from.

At graduation level you can choose from Bcom, BBA, BMS, economic honours, BCA

At professional level there are courses like CA, CS, CFA, CMA, FRM

As you can see there are a lot of options and you can choose amongst them based on your likes and preferences.

For more details you can follow the below link
https://www.careers360.com/articles/4969-Career-review-commerce/amp

Hello,
Since you were having computer science and if i guess you have a interest in learning computer then you should go for BCA (bachelor's in computer applications) and if not that then these are the options you have.
Bachelor of Commerce (B.Com)
Bachelor of Economics
Bachelor of Business Administration (BBA)
Bachelor of Laws (LLB)
Chartered Accountancy (CA)
Company Secretary (CS)
Cost and Management Accountant (CMA)
Hotel Management Courses
Journalism and Mass Communication
B.Desg
Government jobs are also options
Aviation courses
Diploma courses in digital marketing


I hope this helps.