There are many photography bags. Just go out and try to have your pick, you’ll be at awe. I think that choosing your first camera bag can be an overwhelming decision for the new photographer. (More experianmced photographers don’t choose a photography bag, they buy them all).
This is where something like the new Stash Master 13L from Mindshift gear can help. You can keep your old (non-photography) bag and eat it too. Essentially the Stash Master is a padded cube with a zipper on top. It’s kinda the right size to fit in almost any bag and convert it into a camera carrying device.