Lot of potential. I'd love something like that.

Use that hill + wall as a little raised bed; convenient height for some strawberries, herbs, maybe little blackberries on the face wall. The hill can help you with some water capture.

Also convenient placement for some bbq/oven setup + maybe a little bar/food prep table.

Recently I've seen this one; a total overkill with unnecessary jacuzzi, but I'd love to manifest something like that for my fam one day.

- make a smaller humble one in one of the corners

- use the roof (at least for the water capture)