I've learned that amazing subjects still need good lighting... It looks like the lighting is directly overhead (mid-day sun). That doesn't generally create interesting photos. In the future, try to move subjects under a door way or opening to create the "edge of the forest" lighting in the middle of the day.
Also, you could have played with shooting perspective instead of shooting him straight on.
Last thing, I would have tried to frame him to the right of the shot with the whole flute in the frame, taking him off the center...
Hope some of this helps! I'm just learning too