I agree with everyone in that your super imposed lines came out great! I find it interesting that after that, your lines get wobbly considering how strong your initial lines were. I know something that helped me is, I do really good with being super straight with short lines but... as they get longer...well it goes to pot. Learning to draw from the elbow was good for me, but anything that was longer than that reach really messed with me. learning to draw from the shoulder was weird to me. something that helped me was doing shoulder and arm circles as in exercises. Doing this limbered up my arm cause otherwise I felt stiff and awkward. so kind of doing some arm exercises and practicing moving my hand just at the wrist, locking it, moving from just my elbow, locking that and then moving only from my shoulder helped. it was a different type of movement for me to learn, moving from the shoulder....so practicing the movement without actually drawing helped me figure it out a bit and be more confident. hopefully that's helpful for you too! looking good!! keep up the practice!