It's exciting that you are adding a person to your Notebird account. That is one more person you and your organization get to impact.
Click People in the navigation bar at the top of the screen
Click the Add New Person button on the right page
Type the information into the contact fields
Click the Save Person button in the bottom right
The profile of the new person you just created will show on the screen. Get started by creating an update for the new person you just created.