Once you have installed the Polkadot extension please make sure you have done the following:

Make sure you have created an account — if you are seeing the below screen, you need to press the “+” button and create an account. Make sure to store the seed phrase associated with your account securely.

Please make sure you have authorized the Ottó onboarding application. If you do not authorize the application you will be unable to bind any accounts.

You can tell when there is an Authorization request as there will be “Auth” text over your Polkadot extension. If you open the extension the authentication request should appear.

Once you have done this make sure to refresh the Ottó webpage.