You are a machine. Be careful to not burn out !
But all these exercices are super nice. I really like the layout you have to train your lines, boxes, circles and gesture drawing. If you don't mind, may I borrow the idea ?
Also very good idea to look for perspective and draw general lines / feeling on city / landscape photos. I'll do that to train my observation skills.
Your studies are super inspiring and stimulating. Very good job.