1 hour greyscale study

Hello LOA people! this hour long study of one of Anastasia's chain poses in greyscale was done with a three goals in mind 1. Better improve my understanding of shading the body by learning where blocks of shadows go and how they distort with a body's position and form. 2. Better understand how values work in a body, to improve my shading and understanding of color down the line 3.learn how to work in greyscale and how to capture complicated forms in greyscale, as I would like to have this technique under my belt for future work in digital art any critiques, technique advice, or potential activities that would help me further with those goals would be much appreciated, or any critiques that spring to mind in general. My work was done in procreate using a variety of brushes for both coloring had smudges. thank you in advance for your time and expertise!