Hey so just a couple of things I noticed: the upper part of the arm at the top (the one reaching up) looks a bit too long. The way it is now, I think it will fall too close to the hip. I had the same issue and SuperKasey helped me out. If you use your own body as a reference the upper arm/elbow normally falls down by the end of the rib cage. So keep an eye on that.
The head might be a bit too big, but its harder for me to tell without the whole body.
This is more of a personal preference, but it might help you out. I'm looking at your skeleton and I noticed that the arms and legs start from the middle of the hip and upper body. I find it more helpful to start the arms and legs from the sides of the hips and upper body. In our bodies that's where they are placed anyway, and it might be helpful for placement/length to add in the joints for the shoulders/elbows/wrists/knees etc. You actually might be doing this already haha whatevs. Hope I helped. Looking forward to seeing the finished drawing!