Hi Abhinav

CEH is a very popular certification to take up as it prepares for a rewarding career in the field of cyber and infromationn security.

It depends on the place where you are currently residing but nearly every city has a center

There are a lot of private institutes offering training such as Jetking Infotrain Ltd,GIT IT Academy to name a few

You could go to their website to know more

Many colleges also offer such training at subsidised costs

Amrita Vishwa Vidyapeetham which has campuses in all the south Indian states offer this training as well

There are many online training courses as well on udemy,coursera etc and you could take a look at that