I did a quick paintover. the sun is between golden hour and sunset, so your light source is orange, as we can see on the clouds, but we cant see on the character. white object hit by orange light will look orange, and the highlights are bright yellow. the skin also should look much darker
for the values, if your cape is white, then the parts that fall under shadow are way too dark on the picture and monochrome, the clothes and armor definitely should show the blue from the sky in the shadows, and also have some light reflection around the edges (light hitting from the environment)
on the bottom I think it would be a good idea to leave it dark and rough, lost edges provide a resting space for the viewer's eyes
hope this helps 
really nice job on the background, great colors
