Asking for Tips and Critiques + Progress

After stop drawing for years, I start to drawing again! :)

My hand so stiff and I realize my fundamental is so lacking. So I start gesture drawing and learn a bit of anatomy several months ago:
https://imgur.com/a/8tTVNEz

Progress several weeks ago (please ignore the notes):
https://imgur.com/a/J6JUtIT

Recent drawing:
https://imgur.com/a/B2cuya3

I think I start to get the hang of it, but the problem is, I work extremely slow! The first drawing I need 7-15 min per figure. The second and last image, I need 20-30 min per figure. I just can't keep it short. I need some tips. And please criticize my drawing, what I can do to make it better? What do you think lacking from it? Need some feedback. Thank you!