I have a burning question, what should I critique? I can give you these pieces of advice though. If you wish to endeavour in to the art of drawing I would suggest learning basic anatomy, although you have a preference for a certain style, if you lack the basics, you can not truly draw it.
What you want to avoid as a aspiring artist, is when you do a drawing two people, is give them to faces who are alike. Makes them look very unnatural. I would suggest doing some portraits. Learn how a face works, wich proportion a face has and what volumes make the face. This will help you in the long run too.
Developing a style means drawing a lot. You have got a certain feel for it, but it needs to be refined. Look how other artist approach the figure.
Now, I can recommend a few books you can read concerning anatomy and fun with drawing.
Fun with a pencil "Loomis"
Drawing from life "Bridgeman"
Dynamic Figure drawing "Hogarth"
Good luck and foremost, have fun drawing!
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