If it helps you do a basic skeleton like you start with the line of action and then place your ribcage and pelvis circles and then connect your arm and legs. That's what I did for my first time doing 30 second gesture and most of the 30 second gesture is there to get your brain to focus on the important parts of the pose and exclude the details so that you can do the same thing for say 1 min. or 2 min. gesture. I think your poses look fine, but if you want more people to see it and give feedback I would join the discord if you haven't already a lot more people are active on there during the day.

Oooh you did really great on this drawing! I think you really nailed the overall shape and volumes!
For the 30 sec gesture drawings a tip: for me a thicker brush / pen worked better, it gave me more freedom and lightness. (But keep whatever works for you )