A little update... They doing great now. Like you guys said, they have to figure it out, and it doesn't work well if we force it or try to expedite the process. We had them both on leash, trying to keep them apart until we felt comfortable with them. I think this was kinda stressing both of them out.
Anyways, right about the same time I made my original post, we let them out in the back yard off leash, and they started to figure it out on their own. We'd have to intervene every once in a while and establish our rules of play, but they both listen to us well. Now they're pretty much glued at the hips.
Thanks for the advice!