Hello Ishika,
Here are some suggestions of futher courses you can opt for, after completion of 12th
1) Bachelors of Commerce(B.com)
2) Bachelors of Commerce(Honours) or B.com(hons)
3) Bachelors of Economics
4) Bachelors of Management Studies(BMS)
5) Bachelors of Business Administration(BBA)
also you can opt for professional courses
1) Chartered Accontant(CA)
2) Company Secretary(CS)
3) Cost and Management Accountant(CMA)
4) Certified Financial Planner(CFP) 
5) Bachelor of Law(LLB)

Since you have not specified the location where you to find college, if you can then i can help you with it!