If you are interested in robotics you can opt for engineering after your 12th class.

Robotics includes many branches. You can choose the branch according to your interest and skills like if you are interested in programming you can opt for CSE branch.

If you are interested in machine drawing you can choose mechanical branch and if you have interest in sensors and electronic you can go for ECE.

You can also opt for Mechatronics engineering it is directed towards robotics. 

The most important thing is you choose the top college to persue your engineering to get good knowledge, exposure and placements.

There is a lot of competition envolve in engineering to get top colleges make sure you plan your study accordingly.

All the Best!!