Accounting & Commerce

No, you can't. Commerce has a very good future scope. You should do B.Com.
Good luck.

Well, it depends upon your interest. Either you can opt M.Com or MBA in Finance. All depends upon you.

Check out this link to get the list of B.Com colleges in Bangalore:
https://www.shiksha.com/accounting-commerce/colleges/b-com-colleges-bangalore

You can work as an actuarial or CA. Also, you can appear for government exams or make your career in the stock market.

5, Mahapalika Marg,
Mumbai, Maharashtra 400 001
Tel No.: 022 22620661
Fax No.: 022 22659484
Principal's Visiting Hours:
Monday to Friday
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For general enquiry write to: webadmin@xaviers.edu
These are the contact details, since your questions is very specific, it would be better if you contact the officials and clarify all your queries.

You have plenty of courses to pursue after 12th commerce like:
BBA
B.Com
Actuaries
Integreted Law
CA/CS/CFA
Mass Communication
Journalism
Business Analyst
and many more.
First thing, you have to do is identify your interest of subject or field and let us know for further guidance.
For getting good placement:
1) Improve your skills
2) Should maintain a good personality.
3) Vocabulary should be good
4) Fluent in English speaking
5) Know your strength and weakness
In addition to these, studying in a top rank college may count.
I hope this answer has solved your query to some extent.
Please feel free to revert.
All the best.

After 12th there are very few jobs available. You can join a BPO or work in a CA firm. You can also appear for government exams (clerk level).

If you want to learn about the commerce field then join a CA firm or if you want to do a job in the evening then you can join a BPO.