What you can do is instead of drawing the whole body, you can try stickman figures. What i mean by that is try to draw lines that connect one form to the other in one sweep motion for example one line to respresent the whole arm and another to represent the connection between the both arms and so on.
Try to imagine the flow of water in the pose that you drawing, where the water will crash and turn or where it will flow swiftly. This way you can draw stickman that represents the gestures.
I am posting my practise sketches here with youtube timelapse so that I can get some critics on my process. I also hope that my videos helps few of you. I am not a pro at all, I am just trying to be one. I am aiming to publish my own comics soon because I would love to acomplish something like that in my life.
