I would not be surprised if the ratio of single men to single women on swinger sites is 100:1 (it may well be more).
As mentioned, there are a lot of posers.
Married players may look good, and work for some, but I personally will not go there (too much risk for severe drama). This is especially problematic if they are sneaking around on their S.O.
One of the primary aspects of a good, working, swinger relationship is open & honest communication. So by playing with a cheater you are off to a really bad start.
There are couples out there where one may give permission (a "hall pass") to the other to go out and play. These are pretty rare though. Perhaps even more rare than single women (a.k.a. "Unicorns") in the Lifestyle ("LS").
There are nice guys out there. They are just heavily overshadowed by all the jerks and rude men. You for sure have your work cut out for you (especially through date webs).
Swinger Clubs give great favor to single women, so if there is one nearby, that would be a good start. Be prepared for an overwhelming amount of attention though. One place to find a club listing is here:
https://www.swinglifestyle.com/swingers/clubs/
Clubs can save a lot of time by greatly reducing the number of posers, and cutting down on emails & chats.
"Date Web" sites like Kasidie, SLS, & SDC will have more options, but it can take a lot of time to separate the wheat from the chaff.
This BBS (SB.com) is a fantastic resource to learn from, and to get to know some active swingers. (It is not necessarily a "hook-up" site however.) Spend some time here, and you will likely be much better prepared as you enter the Lifestyle.
Enjoy the Journey