Nicely wonderful job on your pose renderings, zkbpkp.
I like how much lights and shadows going on here, yet your proportions and angles are intuitively perfect, but your spaces are all there; as negative spaces go, but your gestures are a teeny bit too rigid and stiff. Would you please time youself while you quickly sketch out your poses, with 2 hours of 30 second quick poses? (all flipped horizontally and/or vertically, and/or grayscale) All set to these videos linked right here?? https://discord.com/channels/707975029748662332/707983685118460046/710239866675396649
The reason why you could do these is as a result, your gestures of your spaces, relationships, lights and shadows will become less rigid, and more intuitive, vital and energetic with your lines of action and rhythm.
Good luck on your goal, and stay safe, happier, healthier, and brighter.
Well done wth the consistency of your positive and negative space, zkbpkp! It is also very apparent that you've been paying attention to light sources in your work! While your light sources are clear and your spaces defined, now is the time to start incorporating fluidity. To practice this, break the general shapes down of each body part! It will give you a deeper understanding of how bodies move with emotion, as well as how muscles contract and expand when they're frozen in movement. Try warming up with zentangles and working through some shorter class sessions that push you to capture the barest of detail so you're more inclined to show the movement in the picture, rather than the pose itself. Best of luck and happy drawing!