Hi. I’m 30 years old.
I personally have not used real photographs, but I’m sure there’s a way to do it! I would maybe look into treating the photos first with something like mod podge or another photo-safe product. I don’t know of a particular brand or store that carries perfect glass, but I’ve found large flat glass bubbles at Michael’s stores. I just pick out the best ones, and use the bubbly glass for other projects. I hope that helps!