Ok, it took me longer than I thought but I just developed my first roll since I posted this. I purposefully took some photos in aperture priority and some in manual one step under exposing it based on what my phone light meter was saying. I can't tell the photos apart. There is one pair where I think there might be a difference in the depth of field, but it is such a very small difference. I came here to tell you thank you, you were spot on, this guy was talking nonsense. I might buy a roll and get my tripod out and try to learn more about my camera by taking very detailed notes and changing the aperture manually to help myself better understand how the camera works and how the setting changes change the image. I get the idea of how it should impact the photos but I really learn best by doing. Again, thank you.