Let me direct you to the Member Fiction section since that's pretty much the only place that actually occurs. If you're hellbent on it happening to you, you're going to need to work your ass off to make a lot of money so that the woman has a reason to actually keep you around rather than just running off with her "real man".
Unless this is already occurring, in which case go make a journal and like minded people will come to you!
A number of us here "feminize" occasionally and to varying degrees, although not usually for the purpose of cuckolding. It's simply a fun thing for you and your KH/partner to do. I wear pink panties much of the time, and have dressed up completely on a couple of different occasions. We live in New Orleans, and there are lots of "Dress up" events, as well as places that will dress up a guy for a party or whatever. The first time I did it was for a Mardi Gras masquerade party, and I went to a local costume shop. They did a pretty good job and it was fun, but it was a little too over the top to be believable. The second time I went to a local department store that advertises "makeovers" for parties or other events. They did a terrific job. I could really have passed as a girl (at least in appearance) and both my wife/KH and I had a great time.
Its a shame the responses here all seem to be a little negative. Because of that might I suggest this site as an alternative https://cuckolding.club Its not great for chastity chat but would cater to you current interests.
There's also a 'Cuckolding' section of this site that might be more helpful and appropriate than the 'Introductions' section!