As a portal user you can view the list of organizations and there is the option to "Create organization".
Before an event can be created, there needs to be an "Organization" that will be the host of the event. A name and physical address is required for an organization.
You will be asked to set the default fee and refund policy settings.
Finally, after creating the organization you will be asked to create the user that will be the "account owner". This user will have access to manage the organization's settings, create new events, and be able to add payment information. The first user created must be an account owner. After that user is created, you or they can create new users of any permission level.