This walkthrough is planned but not published yet. The transcript below covers the same material if you would rather read it now.
What each panel on the organization dashboard is telling you, and what to watch.
The dashboard is the first page you see when you open an organization. It aggregates workspace status, current plan and usage against its limits, and recent activity. The number worth watching day to day is usage against plan, because that is what turns into a surprise at the end of a month. Activity gives you the audit trail of who changed what.