Too flat, and your colors are really not working here. Play with more layers, and a wider variety of colors and shades. The key to creating depth without having to use a c4d, or a stock, is to layer your brushing. Vary the hues and shades, and you'll start to get an idea of how to do that. Just play with it. As for the colors, you've got too much grey color here, feels like a washed out autumn color scheme. I'd also blur, or fade that light part on the right, it's too distracting from your focal point.