Shoulder on the left should be lower compared to one on the right; I noticed that in your gestures angle between shoulders is sometimes a bit off. Also you had curve on upper teeth in blue sketch but in black they are flat; it curves under nose
This month for the challenge is to make 10 minute gesture drawings. Is that difficult to do?
It is easier with warm up ( for example a few quick gestures). And take your time to measure everything and check the angles
Hope this helps.
Keep it up!