30-60 secs my goal at the moment is to better understand the basic human form
The overall dynamic and flow of the drawings is really good! Particularly from the torso upwards.
I'd recommend trying to focus on getting the waist/legs/feet down on the page first instead of the arms so you can get more accurate drawings of them and gain a better understanding. I'm currently trying to do the same thing so I know the difficulty! Good luck!!