I agree that some softer edges would benefit. It looks like you are mainly putting wet paint on paper that has already dried which misses out on that soft, fluid look of watercolor. Like Oliver shows in many of his tutorial videos, you can rewet an area that has already dried with clear water and a soft brush so you aren't disturbing the paint layer underneath, and when the paper is damp drop in your details such as shadows, brush, flowers, etc. I've learned a ton from Oliver on this point but of course it is hard to master! It's all about the process of building up the painting once you've laid down the initial flat washes.