I'm 32, I think I look a few years younger than I am, though. Don't we all?
When I started, I was old enough to make my own "lingerie" by cutting up boy's underwear and sewing on lace by hand to make a bra and panties. But young (and stupid) enough to think that under my pillow was a safe stashing place. Of course, borrowed the real thing from the hamper on a regular basis too.
Only bought my first wig a few years ago and I'm still in the closet, so I do feel I'm off to a late start. I wish I had embraced this side of me while living single in college instead of purging. Could've really used these websites then.