Hello, I am also a Mormon, a few years younger than you are, who has recently become interested in rationality and Less Wrong. Two days ago I posted a comment on the open thread which has since generated a staggering amount of discussion. I've quite enjoyed it, though it's difficult, as you know. I think that when it resolves itself I'll post an introduction on the welcome page (sort of the way AspiringKnitter did, but not the same)

I'm delighted to have found this community and I've learned a lot already. Any...criticism, warnings, advice, etc.? You're a great role model for me [ironic innocent face].