Hello @Amy. Read this and my earlier thread for ideas:
On old pasture if you have time it can be worthwhile spending 2-3 years improving your soil organic matter with a permaculture type approach of nitrogen fixers in summer and cover crops in winter.
#1 key for you is picking the right rootstock. For apples if I could do it again I would use Bud118 and crop heavily and branch bend to control size.
With SWD arriving I am de emphasizing late summer/fall berry crops like raspberries. Black currants and Elder flowers are high yield for little work.
Read my posts and feel free to ask questions.