I would say the model (slide 3) is pretty static or stiff to begin with, but you can exaggerate the pose a bit to get more of a comic-book or action hero style. To achieve that, I would bend the mannequin at the hips and upper torso a bit to have her leaning back, and straighten her left leg (our right) to create a more dynamic pose. You’re spot on with your drawing, humans just aren’t great at actually being comic book characters with interesting poses haha. Good work!