Nice work! You definitely got good proportions to the references. Don't feel too tied to copying perfectly for this exercise though. Practicing good sketching habits like looser linework and searching lines first will help you get closer to accurate proportions and clean linework later on. Keeping a light hand when you first start to draw, using longer basic strokes, then coming back with the darker pressure and details when you feel confident in your foundation is key to the process. You're already on the right track, keep going! You got this :)