If you want to keep your old data safe and start as a new user follow these steps:
- Create an account if you don’t already have one.
- Sign in to your account if not already signed in.
- Change account email to your secondary, or another, email.
- Sign out and select “start from scratch”.
You can then create a new empty account using your primary email address. If you subsequently need to access your old data, you can sign in to your secondary account.