I am also a starter. Comparing your drawing with mine I feel your body structure is more solid than mine. The problem I think is you use too many lines to reach the profile and miss to finish the hole body. I guess you can try draw it faster.
Your lines are soft light so you could practice getting the weight and detailing. It looks like you might want to study some arms and hands. The art pieces are stylized so its harder to judge the figure the same way.
I think you're doing great. I have taken and now teach portrait and figure art. The essence of gesture drawing is to warm up and capture the motion and or position of the model not the details of fingers or eyes. this is why the 30 second sessions exist. I believe that's what you are doing and it looks good. keep it up.