Sara, I enjoyed the lesson. As you say for assignment, I have made a Collage
of my daughter's wedding. Also I used the Golden Key rather than rusty key,
as I thought it was more appropriate! I hope you don't mind.
I have also included the screenshot of various layers to show that, (I hope) I have understood the principle behind this lesson!
Layers for Collage
Same Collage with the Rusty key!