After supplying your billing information, the created billing account will become accessible via this panel.
Using a shared account:
The owner of a billing account can send out invitations to use a shared account via e-mail. The specific address you use doesn't have to be connected with Health Data Nexus.
Clicking the link in the e-mail message will prompt you to log in to Health Data Nexus and consume the invitation.
You can use shared billing accounts to create resources in the platform the same way you would use one that was created by you.
After the process is complete go to Running Environments tab and create your first workspace.