Welcome to Permies Kathryn!
That's awesome you are shrinking your lawn and increasing your growing areas, I'm working on the same thing myself.
I've found blueberries to be a great plant to start with if the soil has
enough moisture, as it is happy in sun or part shade. Thornless blackberries are a little more wild, but I love using them too, and they grow and produce really quickly.
Grapes can be planted beside the trees too, just giving the trees a little head start and planting the grapes a year or two later after the trees are established.
Best of luck with your
apple trees and food forest!
Steve