I agree with asteadman. You'll improve far more with practice than reading about theory. The most useful exercises I ever did were in school photography club

I agree with asteadman. You'll improve far more with practice than reading about theory. The most useful exercises I ever did were in school photography club - most weeks they'd set us somewhere boring to burn a couple of rolls of b&w film with "interesting" shots. I found this really difficult to start - everything turned out terrible. I think that was the point. So take the camera somewhere dull and burn a few dozen shots. For instance go in the kitchen and find some interesting compositions, like a dripping tap. Experiment with unusual angles, framing, depth of field, very long and very short exposures and extreme closeups. Can you get some interesting effect or a sunset reflecting in the chrome at the same time? How can you make it more creative? Go in the garage and do the same with a drill, a saw, or a car wheel. Portraits are a whole new can of worms, so a sympathetic partner or family pet helps. You'll start to use longer lens than phone, be further back, and take much more flattering portraits. I'm sure there's some websites out there with better ideas for learning composition than me. It's a little like the process artists call "learning to see". You'll gain internal awareness of what might make an interesting photo, and see the framing, and notice the light, rather than just taking snapshots. And sometimes none of this applies, the best photo is being there at that moment with a camera :)