Man, really, you're best bet is to forget the fetish right off the bat, and just meet someone.
Go on dates. Tell jokes, Be fun.
Find a connection.
Then, a few dates in, when you're sitting around high on "new crush" dopamine and staring into each other's eyes, talking until 3am, you broach the subject of fetishes.
They ask.
You blush.
They say "No really, tell me!"
You blurt it out.
At this point, most of the time, and far more often than people around here seem to give credit, they'll be like "That's it? That's not weird at all!".
Sometimes it's followed by a "Well, I'll try it if we start slow" or "Let's work into it, I'm not used to it."
And then again, sometimes it's followed by a "I'll tickle you but I can't stand to be tickled, ever."
And every so often it's followed by a "Hell yeah! That sounds awesome/cute/fun!"
You gauge the reaction.
You act accordingly.
If you're not compatible, then you're not compatible.
I've had all of those reactions in my dating life before I got married.
I found girls who wouldn't even entertain the idea, albeit those were very rare.
Most of the time it was "That's the most adorable kink I've ever heard of!" and they were more than happy to tickle me, and occasionally let me tickle them.
And a few times, also very rare, it was "That sounds hot".
That's it. It's that easy.
What doesn't seem easy is wasting away dropping messages to everyone you know that's the opposite sex who has the fetish practically begging for a session.
I've seen so much dissatisfaction on here over the years from people who can't find a tickle date.
You guys gotta relax.
We're a bunch of people that like to make people laugh, and have people make us laugh.
That's it.
Go out there, fall in love, have someone fall in love with you, and tell that person that loves you what makes you happy, and hedge your bets.
Don't sit around here hoping that one of the four or five women that haven't been chased off of the TMF by creepers might choose you.
It ain't easy, but damn, it ain't that hard.
Also, sort of a sidenote, and I don't have any proof to back this up, but I'm willing to bet that the vast majority of women with this kink aren't on the TMF.
They might lurk once or twice in their teenage years, yeah..but I get a feeling most don't want to be part of a "scene" or set up a Fetlife or whatever because of how "dark" and "kinky" it feels..
..when at the end of the day all they want to do is have someone wiggle their fingers over their bodies for a little bit while they laugh.
Most girls could have any guy they date do that within the bounds of their relationship and not have to deal with the baggage of being part of a "community".