Norma, thank you for wanting to help, but I don't want you to bother with looking up notes or going to any extra effort.
I hope to place it away from the house, like the garage at the bottom of the first photo and in the second photo, maybe at a right angle to the driveway leading up to it, so the garage doors are less visible from the front of the lot. At first I'd hoped to have grass cover the top, as you'd described covering up the stairs hole in the house, but it seems like since I'm not building an actual basement, I'd need a roof.
I've been watching videos that dimple the ground, then level it, to make the progressively lower ground level. Some videos show the use of stairs in some incomprehensible way to create a slope then they delete the stairs. I'll fiddle with it and holler if I hit a big hitch. Thanks again!