You could probably take pictures to your local nursery and ask them for a quick sketch.
Or you could post a photo here and we could try to give you some ideas.
you could find master gardener web sites. Ours is at University of Florida,from there you can find the one in your state. They have all kinds of great downloads about anything gardening for your state.
Better Homes & Garden have some free plans that you can download, or perhaps they will just give you some more ideas on different items.
Faye, is this for the sun or shade?