You have improved a lot in such a short time. One of the difficulties in learning dynamic poses when we are stating to draw is that we are still learning anatomy, so we make a sketch and then spend time not knowing how to make the hands or the muscles, etc. That's why some professors recommend doing quick sketches not focusing on details. That way you cane express your lines without the fear of screwing up the hair or the face and other details.
This is the source of the image:
(sorry that it is Spanish, there has to be an English version in clip studio website)
Later when you learn more about anatomy you can start making the drawings more detailed. But you can start with very simple poses. Good luck!