I won't comment on anatomy but structural issues also can be the reason why rendering is not working. It is however something that can only be fixed with studying fundamentals/anatomy/fabric and takes time. For colors I would highly suggest using different hue for shadows and highlights, e.g. desaturated blue instead of grey (see A). I made highlights more pink and shadows violet for the dress. For drawing magic I would suggest starting with darker background, adding medium color and then highlights with layer on "Add" setting (see B). When light falls on a surface (in this case green), the materials do not reflect it fully (unless it is a polished metal). That is why I added more subtle green to her dress and arms. The concept is pretty cool. I hope this feedback can be of help. Good luck! | Artwod Feedback