Those gesture are good! I love the one with existential crisis (1 min up right corner) and the one that hangs on other gesture (1 min middle left)
I also hated doing gestures I was like "it so messy why would anyone do it". I decided not to think of it as a gesture it is just another sketch and it started getting better. I don't really think about time when I am doing it if I need I will just add a couple of seconds to draw that arm I forgot about.
I am always caring a sketchbook wherever I go so I can sketch people. You have only a couple of seconds to capture what you want before they leave or change position. It is funny when they notice you keep staring at them
If you have problem capturing angles or seeing what ends where (i think your angles look good) you can hold pen over reference and then over your canvas. For example put it over arm to see how much tilted it is or vertically to see if head is further than knee.
Keep up the good work Ola!