I want to get really good IV's along w/the Nature I RNG'd for.
I edited my post.
Also, if it is shiny, do I catch another pkmn and check the IV's? While still having the egg?
Or is the answer already in the guide because I had a friend of mine tell me, but I'm still wondering.
The info you edited in is irrelevant for getting IVs. Just put the pokemon in and make an egg, and save before you get it. The order doesn't matter, it should be shiny.