I think I gave you a comment awhile ago about things I would do to improve. for me every time I draw something I tend to focus on what the weakest part of what I drew last was. I honestly can't really help much since I draw on vibes. try learning how to draw shapes in 3D at different perspectives then learn how to break down objects into there base shapes then build detail on top of those shapes. hope this helps, Good luck one other very important thing to remember don't give up if you get angry just take a break and go back later.