Good news, google has finally introduced it's domain registration services for Indian consumers.
Google first introduced its domain registration service in 2014 summer, then on January 2015, Google Domains has lifted the invitation-only access for US. And now its beta is available for India.
Google Domains is not currently no available for worldwide. Besides India, it's currently available for Canada, united States, And United Kingdom – to be notified, sign up for an alert from Google.
You will also get private registration for no extra cost, and runs on Google’s DNS server to help your site load swiftly. You can also Customize your domain with up to 100 sub-domains.
If you're using google's blogging platform blogger.com, you can directly by a domain for your blog from blogger.com. Just go to -> settings -> Basic and then click on buy a domain at "Blog Address" section.
Or you can go to Google Domains.