Using your Google Account, sign up for a developer account here
( https://play.google.com/console/u/0/signup ).
During the signup process, you'll need to review and accept the Google Developer distribution agreement you can read that here:
( https://play.google.com/about/developer-distribution-agreement.html ).
There is a $25 USD one-time registration fee that you can pay with the following credit or debit cards: MasterCard, Visa, American Express, Discover (U.S. only), Visa Electron (Outside of the U.S. only)
Type your account details. Your "Developer name" is displayed to customers on Google Play.