Hi Andrew. This is a very good shot. the pose is good. the expression is good. The composition is good. You did well not to get any reflections from the guitar. It is a bit bright for my liking though, but that is only my opinion. I do find the shadow at the base of the guitar a little distracting though, but that could be cloned out. Excellent overall.
Lovely poses and well shot. I’m not sure the white background works with shots that are defined by shape and lines. They lack dimensionality. In B&W against a mid-toned background would have worked better for me.