Good evening, Pennyberyl, and welcome aboard. I'm Polyvios, I'm fine and how are you doing this evening? Say, you're doing a really fine job on quickly sketching out your figures, hands, feet, faces, and expressions. Please do kindly keep up the totally great work ethic. But, if your time limit for each of your sketches was 2 minutes, then your quick bold power in your lines seem a bit too stilted for my tastes. How would you like to loosen up your hands with 30 more minutes of 1 minute poses of figures, hands, feet, faces and expressions?
The arguement behind this critique is because you could and should be really and completely holistic in your approach to drawing attitudes and poses. For most details, please look into the Mike Mattesi drawing books on Forces and some gesture drawings from Pinterest and more drawing tutorials on YouTube.
My hat's off to you, and let's hope they've encouraged you so much.