Hey there! Great work! Lovely folds :) Adding to what @Kristian Nee has already said it's very hard to see what material the clothes are made out of, in fact, they blend in with the skin. You should probably do some material studies. To start, I recommend using differently textured brushes for different materials it helps me a lot as well :) It also doesn't help the readability that your value range is so small. Don't be afraid to deviate from the reference in order to get a better punch :)

Hey Flynn! Great job, I really like the proportions and the gesture of the study. The first thing that stands out to me (not drapery) is it feels like she's floating on that chair. Right now, it feels a bit like she's floating. I feel like it placing her in that chair a bit more would ground her in the scene and in turn give you a better idea of how the drapery might be flowing. For the drapery to me right now, it feels more like a good study of what you were seeing, rather than an interpretation of what you were drawing. What I would say is try and think of the fabric as something wrapping around the form. @David Finch has a great video on his Youtube channel about drawing clothes I'd highly recommend.