Sounds like you're ready to start going on dates and trying to develop real relationships! Congrats, it's a big emotional step!
I didn't meet my Mommy through the "community". In fact, we met on a "vanilla" dating site. What you need to do is be able to be yourself, be genuine, and be able to describe what you want to from a relationship with another person.
By going out and looking for just a Mommy, that's all you'll have in common, and, even as important as being an ABDL is, that's not enough to sustain many years of happiness together. You should be compatible on other levels, as well, and have goals and dreams that are at least somewhat aligned, etc.
Get out there, take some risks.. You'll find someone who can love you enough to do what it takes to make you happy because you make them happy, too!
Above all, it's a give-and-take!