Hey Ke, I like this pose, very gestural. One issue I see in your sculpture is that the forward leg is too long. If you were to straighten it, it would be longer than the back leg. I also think that having the feet lined up the way you do makes the pose feel unbalanced. I would separate the feet so it doesn't look like he is walking on a wire. I did some drawings that I hope will help, look forward to the finished piece :)