It might be easier if you loaded so that the waves/wavy lines will be going across the quilt and not top to bottom. The middle pic, make the left corner the top left when you load. If you plan an rolling back and forth, you need to pin baste (pins no more than a hand width apart) or sew baste the whole thing. After you have basted the whole thing, you can SID the narrow border as you advance; start in the middle at the top and go left or right and down as far as your work space will allow. If it makes things easier, trim your batting, leaving at least 4 inches extra on all sides.
You got this.