Read both of the answers above. Great advice by real people who know about the lifestyle. We were all Lifestyle first timers at some point and I can say a bad first time will stick with you and might sour you.
FaceTime, drinks, dinner, real honest conversation. Make sure both parties are onboard and not one spouse making the other do something they will regret. Swinging is not a cure for a bad relationship, a bad relationship will only blow up if forced. Look for the signs of coercion they are sometimes hidden.
As the others stated, make it about them, what they want and read the why they want it. We have learned that you will be rewarded with a great meeting and a no pressure first time.
I see you are already reading our members and know who to trust. You seem like a new thoughtful presence on our little board.