Looks like you've got your head on straight. Just keep your expectations at zero. If all that comes out of it is a decent friendship, so be it. It could be that does not happen or, it could be something more.
I think at this point in time, at best try to treat it like any courtship. Yes, the two of you have a history, but you can take this from a frame of getting to know her and determining if she's someone you might want to "date". Does she have characteristics that you like. That you could live with. That you wouldn't want to try to change. If you can't accept her as she is, then maybe you don't want anything more than just a friendship.
This would be the time and place to work towards that.
