What size bike is good for me /////?

i'm going through a mid life crisis .and i'm wanting to get a bike, i never rode a bike before i like cruisers. i'm thinking about a 750 or so. i'm 6 foot and i want a bike big enough for me to ride with my wife we are 470 lbs. combined // i want it to be easy to learn on ,but big enough so i can take passengers after i learn to ride thanks for your time