Make sure she’s bisexual first of all ... or at least no-curious. People are self interested first so it helps a lot if she’s invested in the outcome of bringing women around you as well.
Otherwise, make sure the chick you decide to deal with is open to the idea BEFORE you enter into any arrangement with her. Things always go much more smoothly if you finish how you start, meaning it’ll usually be an uphill battle trying to convince a woman to start bringing women around versus if she knew what she was signing up for to begin with.
EVERYTHING in life is conditional...EVERYTHING.