Rick-drawing

Hi Matt- I’ve been super busy and just doodled away at this over a week during meetings and in between calls. I’m pretty done with it, but any tips for next time? I may do a bigger torso on gray paper, kind of serious version of this one. I know i need to focus on the planes of the ribs and getting the angles of the ribs better. Mine are all over the place. 
I kept getting lost drawing these things!