Hi. Thanks for posting your question on JustAnswer...
Have you received your Kindle?
From the home screen, click on the Home button. Go to Menu. Go to Settings. Select Register.
Your Kindle will then prompt you for your Amazon account username and password. If you've already set this up, enter it. You Kindle is then registered and ready for use. If you didn't yet setup an account, you can do so my visiting Amazon.com from your computer.