Hi, Vishwesh, and welcome to the Community,
If your country, which in this case is India, does not appear on the list of available countries, then it is truly as simple as that. Skype Numbers are unfortunately not available everywhere due to regulatory, legal, or other issues.
Good Tip: Do not accept contact invitations from anyone whom you do not know.
Do you have a Skype trick up your sleeve? Share your Solutions and Tips with us!