You should take a life drawing class. The classes start with ‘gesture drawings’ where the model will pose for 30 seconds and the move to a new pose. The idea is to warm up by capturing the essence of the form quickly. You don’t worry about what it looks like, your going for the feeling. Then you’ll move to 1 minute poses, then 5 minutes ect. You blurt down the base and add details as time permits.

You’re too uptight and worried about the end product right now. Pump that shit out and don’t get locked into perfection paralysis.