Print your photos and tape them to a wall. Look at them. Play around with the L, cropping and framing, and you will learn about composition and geometry. Enlarge what you frame and leave it on the wall. By looking, you will learn to see. When you agree that a photograph is not good, throw it out. Tape the best ones higher on the wall, and eventually look at those only (keeping the not-so-good one gets you used to not-so-goodness). Save the good ones, but throw everything else away, because the psyche retains everything you keep.