Green, the first thing to do is root your phone. And then get Koush's bootstrap recovery.
You should first get comfortable with using adb through the sdk, and also what the bootstrap recovery does for you (it puts ClockWorkMod's recovery on your phone).
Once you understand what these things do you should also make sure to have your computer ready for doing an SBF to your phone. This is in the event that you get stuck in a bootloop or you just totally hose your phone.
Finally, just go for it. There are a lot of ROMs out there that will give you all types of in betweens from no blur at all whatsoever (Fission) to something that is totally blurry like just an early leak (TBH's 2.2.1), and things in between (Apex or Rubix).
I've loaded 4 ROMs in the last 4 days and learned something everytime.
just have fun And try a few and start to see what you like and don't like.
We're always here to help.