Any feedback would be very much appreciated!
Maybe, just tweak the proportions of the left arm a little bit and it's perfect.
I really like the way you've captured volumes and balance in this pose.
I do see some sizing difficulties, like the closer arm being smaller than the one in the back. Maybe spend a little more time checking the body against itself before you dive into coloring/shading to try and catch issues like that. :) It's so much harder to correct proportional issues after shading has started.
Finishing is not done. Left arm is thin. Left butt is weird shaped. But It's quite impressive that you did it in 10 minutes. Good job