It is a nice photo with an unusuially intense/thoughtful expression on a child. It definitely could do with a little bit more contrast, but if you do this be careful not to blow out the whites as it’s already pretty close on his face. My main critique though is that the shot is both soft and noisey. I’m guessing the softness is a combination of both camera shake and motion blur in the subject, but without the EXIF it’s impossible to tell for sure. The noise is probably do to a high ISO and the shot being a touch underexposed. I’d be interested to hear what the settings were for the shot, because usually with natural window light, faster shutter speeds, wider apertures and lower noise shots are possible.