I'm currently picking about 300g of blueberries every second day, from four bushes of varying types. Mostly I just eat them - as snacks, in my breakfast - but have also free-flow frozen some for when the picking stops. They are protected from birds in a giant cage I made out of chicken wire and posts, and the oldest ones are about four years old.
Blackberries are also ripening, the bunches are heavy on the thornless vine, and am picking every second day. So far the birds don't seem to have noticed them, but I will net them if needed.