Values are very solid and I like that you take the time to do the anatomy, value, skeleton... studies. However, the arms are too short. and the gesture is stiff. This model got kinda of a S curve that you got it right in your study, but in the final drawing it became an I. That shows me that you know how to do it right, but during the process you rushed during the initial phase and what you learned in the studies got lost. So spend more time in your lay-in. Be extra mindful in the first phases of your drawing. Measure carefully, check if your proportions are correct and check if your gesture is working. And just start shading after you're absolutely sure that you nailed the lay-in. I would like to see more from you so keep drawing Best regards