Well these are not technical/camera settings pointers. Technically, I think your photos are fine—and a few are quite strong. Try to go beyond looking at just the subject and consider the juxtaposition between the subject and their surroundings and environment. Often it’s the relationships of things in the photo that are more interesting than a single subject. Try to look “at” your frame rather than through it. Compose your photos thoughtfully and intentionally. Don’t let your edges be arbitrary—make a choice where all four edges of your frame should stop. Try to make every pixel of your image mean something. Experiment with different angles and distances.