You seem to have the same problem as a lot of other manga artists. All you know is manga. (Not to be a dick) You need to draw real people. I mean Google gesture drawing and human anatomy. Learn about line weight and color composition. learn how to paint landscapes. Also learn the digital art program your working in better because that ice could be looking a lot better. You've jumped right into all this complex art without learning the fundamentals. Instead of learning how to draw a style you should focus on the human form and build the style off of that. (Things to learn) Gesture drawing-Anatomy-Line weight-Color comp--- You obviously have talent but you need to cover the basics.