We do, and so does our Dad. He's always fixing things up around our house. One day we decided to work together. We started by making a drawing showing the design. When we began construction, I helped Dad dig holes for the footings.
Footings are like tree roots.
They connect the structure to the ground and keep it from sinking in or tipping over. We dug six holes. I held a tall post in place in each hole, while Dad poured concrete around it. We used quick dry cement, so it didn't take long to set. Then the post stood securely in place.