Here's a painting full of light and loose brushstrokes. If you chose to make a copy what would you want to make sure you managed to include? The warm and cool distribution? How about the hard and soft edges, or the simplicity of composition? It would help to be able to see which elements of the copy are essential to your purpose.
Take a look at the green firs that stick up higher than any other shapes. What if the tallest one was in the middle rather than on the left? Would the copy still do justice to the original? What if you decided you were more interested in the feel of the copy rather than its visual accuracy? Here are a couple more images to consider copying.