Once you've confessed, and to your utter joy your partner has agreed to give it a go, slow down. It's very difficult to imagine what it was like for you at the beginning, when you first discovered chastity play. It's also very difficult for you to put a time estimate on all the research (yes, I mean porn surfing!) you've done. So don't blow it by trying to give her all the information at once. All you'll end up with is a good impersonation of someone drunk, with their head spinning, and none of the usual fun associated with social drinking.
What may be clear in your head, may be a mixed message in her's. My advice: break it down into points. Once you've given over a few points, ask questions. Don't treat her like an idiot. There is a world of differnce between ignorance and stupidity. To quote Mr Spock, "For everything there is a first time."