Commerce and computers are the subjects that are very popular these days. Both these subjects have a lot of scope in IT. You have a number of options in this field as well as several other fields.
Since you have Computers and Commerce in class 12. You can take related subjects in your undergraduate studies. You can specialize further in the field of commerce. BBA is a great option for you. You can further specialize in the field of IT and e-commerce at the end of your BBA. There is a lot of demand for such graduates. And I am sure you are going to do great in it.
Best of Luck!