I think you're doing well! Keep going ^^ Maybe try fleshing out limbs in 1min/2min gestures. You seem to be drawing quite small which could lead to you being stuck drawing small. I suggest using scrap paper if you're worried about using space in a sketchbook.
Sorry I can't provide a very good critique but encouragement is important too :")
Wow! You're gesture is perfect! I can almost see the images in my head. However, it seems like you're scared to be messier and take it a step further. Push yourself out of the comfort zone! Great work. Keep it up! :)