First of all, this is a really awesome drawing and you've done a great job, so congrats!
This is a great composition. Overall its well executed. The pose may be a bit complicated to draw, but you've made it look very accurate and real. The anatomy also is pretty good. I like the face proportions, they look very accurate and I think that may be the best part. And anyone can totally tell who this is from your drawing, which is an Awesome and necessary quality to have as an artist doing portraits. I really like how you did the hair, it looks very real and convincing and has lots of depth. It is flowy and strandy and appears soft, not block-like and stiff. I also really love how you've made the skin look super smooth and soft. I really like it because I haven't seen people shade skin like this before. I use the tip of the pencil to cross hatch mostly and it takes a while for it all to look smooth, and I see your technique is blended and smooth overall. It makes the skin look so real. I love it ^^ The folds of the material look really good. Again, it looks real. The shading is great, although I think this would be better with more contrast. For example, I know the hair is light colored but it would look more 3D with darker shades in the thicker areas closer to her scalp. As well as in the area by her arm where it gets darker - could be darker. Making it more contrasted just really distinguishes one thing from another, like the wall from the figure. And the background would be better if it were way lighter or way darker. It would make the figure stand out more because I think the background is a shade that is too similar to the figure. A lot of the surfaces look similar to each other, and I think the drawing would be better if they had different textures. To separate the table/floor, the figure, etc. But with this particular picture, the background and thing she sitting on are probably smooth surfaces, just like her skin, so this would be hard to achieve. So really great job overall, and keep up the great work!
Strathmore 400 Bristol smooth paper 22in(56cm) - 30in(76cm) in size. Pencils 6h, hb, 2b, 6b, and one mech. 05. Faber Castell white sleeve eraser (which I slice into small pieces, mostly for working on the hair. I like a clean edge for the contrast, so I keep cutting up the eraser). Blending stumps and chamois cloth, both used for blending the shading. Electric pencil sharpener. Masking tape on the four corners to hold the paper in place. Sometimes a .005 marker to do the eyelashes and pupils of the eyes, mostly because that will not smudge later when I'm trying to blend tones. Most importantly patience, I still have a super long way to go in that department. Have fun!