Here are my review comments: I think that you are doing a very decent job, particularly since you are just beginning. I am happy to see you posting your work! One thing I think you need to focus on is LENGTHENING forms. Unless you are drawing children, torsos and limbs will be much more elongated.
The key to all of this is Practice. Draw from life, books, or from Web References as much as you can, and continue to post your work for peer, not just my, review. Other peoples’ eyes can see more than we can sometimes, so having others look at our work definitely helps.
I think you should also participate in Lesson 003, too, if you have time. It is as important to learn the fine details of anatomy and skeletal / muscle features as it is to learn Gesture Drawing.
Good luck, and I hope you participate in the Lesson and post more of your work!
You have through August 5th to post a drawing of a skull.