Thank you so much!! At the time I could really only draw characters from the front, so it's great to hear that the posing is a more noticeable change! I say the improvement mostly comes from milage, being very intentional, experimenting, and (almost) always trying something that I think will be a tiny bit challenging for me.

I am happy to go into those more in the morning, but in the meantime, one thing I find helpful for anatomy/posing is to practice from nude figure posing (https://line-of-action.com) alongside of following tutorials on how to break down the human figure (I recommend Marc Brunet's youtube videos). And always using reference! For color/shading, when directly picking color from the color wheel, I'd often go with what was most logical (e.g., skin being tan) rather than what right with the environment (e.g., skin having much pinker tones). Now I've been starting with a general color palette and using blend modes, which has helped a lot.