Do you see highlighted hexes on the ground around your admin center? If you click on those you should get a prompt for starting new construction. You should also see a window at the top of the screen with information on your settlement. If you don't, try panning around a bit to focus on the admin center.
You can also try clicking the "World Map" display in the upper right, clicking on the village name on the left hand side, then clicking "Local Map" in the upper right. That will center you directly on the settlement and show the management controls.
Nookkrium made a video on bronze age that might be helpful: