hahaha. i had that problem too when i build my first computer. though it was with my dad.
it is all compatible. you just have to not screw anything up. you most likely won't. just be sure you have seen a system being build from scratch so you are more prepared. check out some youtube videos where they put together a machine. you are gonna learn some things from your first build, and it's allot of fun. you also get that felling, "it's mine... i build it".
I have watched these 3 set of videos...
Newegg TV: How To Build a Computer - Part 1 - Choosing Your Components - YouTube
I have seen them and my friend said " Its like building legos"
and since theres 2 dvi ports can i do dual monitors? Then if I do crossfire i can do 4 screens?