There are plenty of videos on trimming fruit trees out there. There are specific ways of trimming each type.Maybe. But if I try to pull them up the back part of the house might fall since all the roots are now going under the house!
I'm going to try and trim them this year and hopefully next year they will give more.
You would very surprised at how much you will need to trim. And when you do they will likely fruit.
But prune them in the winter when they go dormant. I would say January for you.
The trick is the open the centre of the tree up to allow sunlight into the branches.
Good luck!
Fruity tax
Sophia