What If the Earth Was Actually Flat? (Extended)

If the Earth had an edge, I hope it would look like this. The edge of a flat Earth. I know, I know, we've talked about it before. But there's something mesmerizing about it. A flat Earth solar eclipse. Diagonally growing trees. The great wall of ice, guarded by NASA, of course. The flat-Earthers sure have a great imagination. But what if they were right? How would the Earth hold up in space? Would it revolve around the Sun, or would the Sun rotate around it? And why would you never walk to the Earth's edge?