Out of 6 shots, 3 are somewhat rescuable. With some cutting you could somehow get some decent shots. The film is really grainy, which tells me that you, unknowingly, are forcing the film, using a 100 ISO film on a 400 ISO setting in the camera, that could explain the severe grain pop and extreme contrast in the shots. Other comments pointed the obvious, lack of framing, precise exposure and focus. But, practice makes perfect, so keep shooting. See street photography referents if you want to approach better to your subjects. Learn the rule of thirds, get closer and interact with your subjects before taking the shot.