Hi,
There are various courses in which you can pursue your degree after completing your 12th from computer science.  Here are some of the courses for you -

Most important one is btech from computer science.  As you have studied computer science in class's 12 th so it will be beneficial for you so try to clear entrance exam of jee and get a good college.  Some more good courses are listed below -

Bachelor of computer application

Bachelor of science in information technology

Bsc. In computer science

Diploma in computer engineering

Diploma in software engineering

You can go for other exams like nda , nift , clat , etc.
Hope it helps...