Hello aspirant,

Robotics has a lot to do with Computer Science because Robots are programmed accordingly and that is where your Computer Science background would help..

Either during engineering or after it you'll have to work on communication and electronic circuits and build good knowledge of them somehow.
Do any course for that... In not more than 6 months you can create good robots.

You'll also need to program it with languages like 'Matlab' .. you'll be taught about that if you opt for any Robotic course.
Robotic courses are easily available

Hope you understand,
Thank you