Here's another 3-inch square canvas board collage I recently made:
I rubbed the background with green shade PanPastel but it looks too blotchy for my taste. I used a photo from a 1956 book on American Birds (this is a Hummingbird) and added an old postage stamp and a strip of washi tape. When I see collages made by others who are experienced artists they look like something I could do ... but, they aren't easy when you're a beginner. As they say "practice makes perfect" so I'll keep practicing! I'll be back soon with more examples.
Happy creating! ... Barb