1. Register,
2. Be on the lookout for an email after submission. (if you do not receive an email check your spam folder and mark as “not spam”),
3. Click on the Activation link in the email to activate your registration,
4. Return to the site and Click on the Add Listing menu item, Complete your Business Setup. Primary Office first. 

These next steps are “optional” but are highly recommended. And, as a reminder, the “minimum” number of “seats, aka user/logins is two.”