Need feedback on anatomy drawing
2yr
 John Nahashon 
Hello Prokoverse... 
Kindly, I would like a critique of this figure drawing 
Paper size: A3 (it's what I can afford at the moment) 
Medium: Graphite HB <-> 4B 
Please forgive and bear with me with the quality of the photo because I don't have access to a nicer camera. 
I recently finished working on this figure drawing. It is the first anatomical figure drawing I have ever done. For what it is worth, by anatomical I mean drawing a figure while paying attention to anatomy and such. 
I finished going through Stan Prokopenko's Anatomy course (the free YouTube version) earlier this year, and this figure is the first one I have done to apply the knowledge I acquired from the course. I want to become a good illustrator. My focus with this figure was on anatomy, rendering, and composition. 
I would appreciate any critiques on those areas (anatomy, rendering, composition). If you feel you have something to say, kindly, pick any topic among those three that you feel most comfortable with, or even critique all three areas if you are willing. 
Any feedback focusing on any or all of those three areas is highly appreciated.
Thank you in advance for sparing me some of your valuable time