Hello student I'm sorry to inform you but no college or university offer CS course. Only The institute of company secretaries of India offer company secretary (Cs) course.

You can pursue CS course after 10+2 or after Graduation. After +2 you need to undergo through 3 programme Foundation programme, executive programme and professional programme

And after Graduation you need to appear in executive programme directly.

For more updates refer to the link mentioned below - https://www.icsi.edu/media/webmodules/aboutus/courses/CS_Course_01042014.htm

Feel free to comment if you have any doubt

Good luck