I might also try toning down the green area a bit more, Diane. Otherwise, it looks good to me.
Hi Diane! Whenever you can, provide a bit more 'lead-in' space in the direction the subject is moving or facing. He'll look less cramped that way. As you are getting started, one neat trick is to give more space all around your subject than you might initially think. Later, when you are looking at the image, you may want to change the cropping and the little extra space will give you that option.