One: peons! Find Skaggit and have him get our peons back to work.
Two: building materials. I had the peons set up a cache for you where they will store resources they create while you are away. You should check it out.
And three: raw experienced muscle! Constructing buildings in a garrison can take some time but I think we can speed up your first building by hiring Skaggit's recently promoted Senior Peon II. Find him and tell him I sent ya.