Members
A workspace belongs to an organization. Everyone who works in it is listed under Organization → Members. Here you decide who can edit, invite more people and remove members again.
Teams and roles
Projects always belong to a team. A team decides who sees and edits a project. An organization can have any number of teams, and a person can be in several teams.
Profile and privacy
Your profile applies to you personally, in every organization and team. You reach it through your avatar: click it (bottom left in the sidebar) and choose Profile Settings.
Subscription and trial
This view is being rolled out gradually. If you don't see it yet, it hasn't been enabled for your workspace. In that case Subscription is missing from the sidebar and from the profile menu.