.Sign up to an actual swinger site like adultfriendfinder.com
.create a profile and write a nice attractive introduction about yourself so that what you write is a big draw just like your media.
.post some g rated casual pics in nice GQ attire as well as the few naked pics. (Warning
never send dick pictures to anyone who hasn't requested them. It's usually offensive and a turn off to women and couples.) If you attract them with your g rated pictures and your introduction then they will request to see your BBC!
Also you can use a simple swingers add site like doublelist.com which is just simple swingers adds. Not as popular as the swing sites but you should be able to find at least one or two good ones a month on there.
As far as how the experience will go the best thing to do is just watch alot of cuckold amateur movies and other cuckold porn.