Those poses are looking sharp and the line of action clear and distinct! Something that might help you is incorporating the use of shapes/contour to indicate different important curves and masses. If this is confusing/doesn't help right now, that's totally valid. Later lessons in mannequization and the robo-bean will really help solidify both the perspective and use of ideas like this. Happy figure-drawing!

looks like you are getting the hang of it.

Nice figures! I think you have simplified them nicely. I would suggest trying to make more confident and bold lines in your figures. find any subtleties in your reference and push them to the limit. For example, the figure on the right side of the first page has an almost perfectly vertical gesture. Try to find the subtle curves of the body use a more expressive and exaggerated line to show it. Maybe an "s" or "c" curve showing what way the body is shaped or bent. Don't be too afraid to exaggerate! Hope this has helped.

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.