Open the Gmail app or go to gmail.com
Click your profile picture or account icon
Select Add another account
Choose Google
Click Create account
Select For myself or To manage my business
Enter your name
Choose a username
Create a password
Click Next
Enter your phone number if prompted
Verify your phone number if required
Enter your recovery email if prompted
Enter your date of birth and gender
Review the account details
Accept the Google Terms of Service and Privacy Policy
Finish the setup
Sign in with the new Gmail account