Dear Aspirant 

No definitely not, you don't have to worry about that you have study Computer science in your academic or not, you can start learning from basic and can accommodate easily in the current environment of computer science engineering and information technology.there are many student fro state board and remote areas who cleared jee and choose computer science engineering and information technology, so don't think that only you are doing so.Go ahead and take admissions.

Good luck for your future :) 

Feel free to ask if you have any further queries.