After setting up your own account and profile, you can add a profile by tapping on the avatar at the top left and selecting Manage Profiles from the bottom display. From there, tap Add New Profile and proceed through the steps.
When you are finished you will be initially given the option to share with the owner whom you made that profile for.
At any time after the profile is created you can select "Manage Access" to share the profile with others or the owner. Learn more here.