You're doing a great job, I mean in keeping the colors restrained. For your composition, try to look at it from a distance you'll see some room for improvement immediately. The flowers are doing the decorative job but not when you look it from far. They mix up with the background. I made a different composition while keeping the elements same. I've provided visual example in the paintover. It was hard for me to keep the colors limited😅. But I did it. Hope you like it.