Congratulations brother! Sounds like you had proposal well planned out, and you got her a beautiful ring! All the best wishes for you and your future bride.
Look, remember one thing, going into sex with at least theoretical knowledge is NOT for YOUR SAKE, fuck you, you're a dude. Guaranteed no matter how badly it goes you'll still bust a nut and be over the moon. This is a woman you're literally making an eternal commitment to and if you do a piss poor job at introducing her to sex you've screwed both of you for eternity.
That's a lot of pressure man.
So start spelling the alphabet with your tongue and get to ordering off Amazon, chop-chop.