sorry to bother you again with my garden... After a year and a half of digging grass and playing with veg & flowers, I think it's time to look at fruit trees and bushes. I'm not ready to plant it all out (way too much grass and ground elder not helping in places) but I don't want to just plonk someting in because I have space now and regret it in 3 years time iykwim. I saw a garden designer (free consultation at Gardeners' World Live) but he obviously wasn't a fruit specialist and I've also been in touch with a local fruit grower but there again designing is not his speciality (pulling hair out...

Sooooo
here is a view of the garden about 13m x 20m from the beginning of the path

and here is the kind of thing i have in mind (excuse the poor Paint skills)
along the fence on the left I was hoping to put apricot, plum & cherry but as it's more west than south facing I'm not too sure about the apricot... (we're in Essex by the way) ideas?
I'd like a quince with currants/gooseberry/rose around, but I've been told it would get too big. How big do quinces get? I tought they were "small" trees about 3.5m tall? how far from the tree should the bushes be planted? can they be planted at the same time?
also on the wish list James Grieve apple for our son James (almost 11months) but that means fitting in another apple somewhere for pollination? stepovers along the path?
Would a hazel work at the back?
Feel free to give other ideas...all welcome!
oh, and just so you can see what it looks like when you chop off the black plastic, the uggly grass and the bits to be dug

Thanks for taking the time to read this
Julie