Honestly most of that looks really good. The lines are clean and flow nicely. Maybe try varying your line weight to better suggest which limb or form is in front of the other to suggest more dynamic form? I wouldn’t worry about improving this so much as moving on in the curriculum. The point isn’t to perfect each step before moving on, just to get a solid handle on it. As long as you continue to practice you’re only going to get better and you will have plenty of more opportunities to keep improving gesture.

They look pretty good. Watch your torso proportions, as you have some extra elongated space in several of them. I have a tendency of doing the same thing, cramming an extra half head or so of length into the abdomen. The only cure I know of is to keep drawing and taking the ten seconds necessary to measure my landmarks from a few reference points.