It looks like you're getting down the idea of the outline and form to the figure. Though I think you should start incorporating structure more as you continue to work on your figure drawings.
Structure will help you with understanding the planes and surface changes on the human body to prevent it from looking flat. Try using brush strokes in a direction that reflects the surface change. A good artist that uses this technique is Andrew Loomis:
Also, don't think of shading or value as just a color change. Understand the underlying structure first, and then believable shading will follow.