Welcome, and it is always good to hear from someone interested in Indian Scripts.
There is quite a lot registered in Hindi but the other languages are currently relatively untouched. Even those that understand these languages seem to often have difficulty generating the scripts ats present. This presents huge opportunities if you have the belief, as many top generics are still available.
If you can work in Bengali or Urdu, then I think you are looking at a Fortune. I think there is huge potential and I have also dabbled in Punjabi, Tamil, Telugu, Marathi, Kannada, Malayam and Oriya.
I use www.domainsite.com
. Interface is superior so managing your domains after purchase is very easy. Most buyers will probably already have an account there so you can just push the domains.
I will try to advise you where I can, but you must understand that I don't read or speak any of the the languages that I speculate in.