2 Minute Gesture practice over the past couple days. Very excited to keep going!

Hello, I've been struggling with this section but am trying to make improvements! It seems as though I'm making up planes that are going in the wrong directions, as well as shading them randomly where they shouldn't fall into shadow. @Liandro, @Bradwynn Jones I would really appreciate it if you could take a couple of minutes to look at my work please? Thank you :)