Ryan., make your castle focal point. sky was too bright. Mountains should go darker to pop the castle. After that, judge the lightness of the sky. You have to take other thumbnails upto this stage unitl tomorrow's class.
Susie, See How I made couple focal point on the castle. Also I made local values of surroundings different. Overall darker, but not the same local value. Always look for the shape push. This is wonderland. I pushed the shapes of tree leaves very round. You don't have to stick with that but, push shapes more abstract.
Take other thumbnails up to this finished level at least till tomorrow's class. then start the color version of this. Thanks.