I would suggest to check if your proportions are correct and don't be afraid of diving head first into shading/coloring. The only way to improve is through learning through your failures. I hope this helped!

Hey there! Great job! I mainly agree with what @Kristian Nee said as in you need to focus on the gesture aspect a little more. Maybe try to exaggerate the poses to make them more lively.

Great job on these itti! Your mannequins are really solid, and the proportions are good. The think I would say is to draw with more energy. These aren't bad drawings, but they don't do anything to tell me the character is moving. It feels like you're drawing someone standing still. I'd recommend simplifying your drawings to simple C S or I lines. Something @Erik Gist told me while he was my teacher was that any gesture drawing should be done only using C S or I lines. Anything more complicated and you're thinking about structure. In the draw overs I did below, you can kind of get an idea. The gesture of the body can be described in a single flowing line. That's about it! Again, you did a great job. Can really tell you're putting in a lot of work. Keep it up!