Full sun. And a low pH. 5.5 would do. When the test comes back let us know. Can you go
here and figure out which series of soil is under your location?
As to masses of thorny plants...we set up a metal wire trellis like we saw at a local nursery called Petals from the Past. If you google search "petals from the past kiowa blackberries" you will find video and a Southern Living article where Jason Powell describes trellising biennial canes by cutting canes to the ground after the berries are done and using calcium nitrate fertilizer to assist the regrowth of new canes. The raspberries will grow from more than just the crown so can spread better in some ways. I staple some canes into the ground and they root. The sum total is it is not an impenetrable mess and the berries are easier to pick. The trellis can be any pleasing shape you wish. Obelisks come to mind.