I bought Larry home yesterday with his new friend Joe, the rescue told me to keep the area small to start with and to not put anything in they can 'claim' as their own, for instance, litter trays.
I've kept them in the bottom of the cage since they've been home and will probably keep them there until either tomorrow or Monday and then give them a bit more space.
At the rescue he did say to take it at the bunnies pace and if you extend but they fight bring it back a step until they are ready for more space.
Good luck and I can't wait to see pics X