i feel like you have a sense of gesture, but the drawings are lacking of structure, and maybe you're not getting all the proportions right, it seems like you're trying to draw a silhouette, in some of the photos the model is twisting it's torso but i can't see that movement in your drawings. One of the big problems you will face when trying to turn this quick drawings into more defined human figures is that you will sacrifice a lot of your gesture lines in the moment you add muscles and 3D basic forms, and that in consequence will stiffen your figures at the end. So if you want to make something about it, try to find the skeletal landmarks first and be more aware of your proportions from the start, that way a lot of your initial gestural lines will survive the mannequinization and anatomy stages.

Hi Natali! Nice to greet you. You know? For what I can see, you understand the gesture of each pose very well. I think the balance and flow that you're looking for is there. In particular, I really like the two bottom drawings of the first picture, they express not only the pose but the ATTITUDE of the pose. I think they look rad! The left drawing keeps up with the proportions as well and that little line of the bottom of the breasts, as inconsequential as it may appear, points out the volume and "turning" of the torso. The right drawing next to it is obviously more exaggerated and dynamic, which I think is one of the goals of these practices as well, that's what truly means "capturing the energy of a subject". I also think you know well where to place angles if needed, without losing the energy of your other lines. As for the bean, I haven't really studied that concept but, as with the rest of your gesture-alone drawings, I think they look very good. I think you are grasping these concepts nicely and are on the right track. You should keep going on in this direction. I hope my comments are helpful to you. Cheers!