I am very new to Asana and want to switch from personal workspace to organization. I am a “single user” of the organization, but I cooperate with many guests (outside my organization). I would like to upgrade to premium account (like features added), but it seems I cannot do it for a single org. member? Does it mean, I have to pay for 5 members within organization (effectively use 1) and then guests might use premium features as well? Is my understanding correct? What might be a suitable setup for 1 member of organization + 20 guests? Thanks for tips.