Great studys! I also found nr. 9 to be the most difficult one of all the fotos i have done so far. I try to think about the loomis head in a box for my studies. I think the challenge in this picture is to draw the exact amount of cranium that can be seen in the image, despite it beeing covered by alot of hair. To me it looks like you only put the face into the box but not the whole skull. I did struggle with nr. 9 as well, and my own drawing of it isnt as good as I would like it to be either. So im not really an expert, but i wanted to share my thoughts, since I struggeld with that one aswell.

I think you did a great job with the skeletons and I love your enthusiasm. Looking forward to seeing your muscle studies!

I think the most important thing for you would be to draw simple volumes instead of outlines. It would be very helpful to come up with some very simple volumes that represent the body parts, (I use tubes for legs, egg shape or box for ribcage, tubes for arms egg for head). And of course it takes some practice to see and execute these volumes fast. David Finch has a great youtube video called Gesture drawing tips, I would recommend to watch that.

Ok so these are 5 minutes per pose. I challengend myself to put them all into the same world (perspective) this time. So sometimes I had to draw them from a different angle than in the reference it order to still fit them in. Challenging but great practice I think.

I like really like your skeletons. I think you should try to do some different poses from imagination. For the skull studies I think you should basically continue doing them and focus on beeing loose and considering all the volumes. Draw all the unseen parts for some time. And try to draw all of the planes of of the parts of the skull. And do some from imagination from time to time Hope this is helpful. Just keep going!

I think your doing very well. You said you are struggling with the view from bottom to top. How I would go about it: I would do a few quick studys of that angle where you are just focused on getting the most simplified volumes right. Do these long bendy lines for the spine and appendages and than put some extremely simplified volumes on top of it. Do a few of such studies until you get it right than you can go a bit more detailed again, and test your understanding by drawing that angle from imagination. Additionaly I think you should try to invent some poses for the skeleton from imagination, it might be hard (it certainly was for me) but dont worry to much about it you will improve your poses in the drawing from life/video section. " I think that without a solid base I can't move forward." I agree with that to some extend, its true that the chapters are kind of building on top of the previous chapter. However its also true that all of the chapter benefit each other. You shouldnt try to completely master one chapter before moving on. Spent some time on one chapter before moving (maybe one or two weeks, but it really depends on how much you practice and how your feelling about it) to the next chapter. But dont consider a chapter finished but revisit old chapters from time to time to keep improving them. Hope that helps. Looking forward to seeing your future studies:)

Great studies. Your volumes and flow seem good to me. I think you should try to draw it from imagination from different angles to put your understanding to the test. You should also try to draw the skeleton with different poses from imagination. Hope this helps:)