hi,

company secretary courses has 3 levels,

Foundation Programme (10+2 pass or equivalent)

Executive Programme (Graduation)

Professional Programme (Executive Programme)

since you want to pursue CS course after graduation you can start from executive program which is duration of 9 months, after that you can join professional program which is duration of 10 months. there is variety of jobs available after completing cs like legal Advisor,  Corporate Policymaker,   Principal Secretary. popular colleges offers this course is,

IGNOU

VENKATESWARA OPEN UNIVERSITY

MADHYAPRADESH BHOJ OPEN UNIVERSITY

ICSI DELHI.