Raspberries and other cane fruit are relatively easy just plant- prune out fruited canes once a year-tie into a support and away you go
Blueberries need little maintenance -do better in a container
Strawberries-once the plants are bought self -propagating-again relatively easy protect from slugs
All may need protection from birds
Tree fruit is more of a waiting game and the pruning can be tricky
Just my immediate thoughts