Thanks for the welcome.
The size of ground that I've found most rewarding tending to has been <20 acres, any more and there seems to be a tendency for conifers to be relied upon as a commercial crop. I've spent a bit of time in large blocks of Sitka spruce, and have found them to be pretty characterless places!
As to what research I simply enjoy reading about other peoples experiences in the countryside, if that aligns with my interest in small woodlands then all the better.
I'm in Mid-Nithsdale.
Hopefully when the times right/from November onwards, I'll be able to get some Alder and Oak planted.