Wives have to contend with the pressure society places on them to not give into their sexual urges. Guys don't have that issue. If a guy fucks a roomful of horny women he's a hero. If a woman fucks a roomful of horny guys, she's a slut based on societal standards/norms.
It was a mutual decision for the Mrs and I to get into the LS. I basically just came right out and asked her. Even after that decision was made it took her a long time to realize that this was all just recreational sex that was not going to hurt our relationship together and in fact, enhance it. It's no surprise that any women would have fear and hesitate to give into her sexual urges as a newbie. The idea that a husband would WANT to see another guy fuck his wife is completely foreign to most (if not all) non-LS women.
The fact that some have already scrutinized the OP's profile and read things into it is evidence why meeting people online is so difficult, and why I suggested looking at parties vs trying to get traction online for meeting people. Yes, the OP's profile needs work, but the OP did not ask for profile help. They asked how to meet other couples that may be newbies like them. Newbies that will actually meet with you do attend parties, and especially Meet & Greets.
I can almost guarantee if the OP took an online only approach to meeting others that they'll still be newbies a year or more from now, In our first year in the LS we progressed from newbies with zero experience, to a same room, full swap couple. That was ALL due to attending LS events/parties.