I feel like you really excel at making the figures feel like they have volume! What does bother me about these are the proportions, try and study what sizes the body parts are compared to one another. I feel this most in the arms, you are making them really long or really skinny, which makes them feel a bit out of place. What really helped me was studying the skeletal structure and the muscles on the body, so that I know what’s happening beneath the surface. I hope this is helpful to you!

Hi there! Are these digital? Because if so a really helpful thing to do to visualize values better is adding a black layer with the color blending mode at the top of your piece. This will make you artwork be in black and white, therefore helping you see where you lack contrast easier! (I am sure this is possible in both procreate and photoshop, not sure if in other drawing apps too) I feel the first one looks very great, but the second one lacks contrast. Don’t be afraid of adding really dark and really light tones to your art! It really helps make it pop. Good luck with your artwork! You’re doing great already