There might be a video, but I would have the piping done for the flow, and then I would put the garden around the water flow. With the thought about how to keep the water from leaving the pool, and that is another thing that you need to  think about, is the pooling of the water. Call a specialist in the matter, and talk to them about what to do, they don't necessarily have to be there to show you what to do. Hope this helps, good luck to you, I think it will turn out.