can you walk me through the steps so I can become and look like an na'vi'?
There really are no "official steps" to making your self look like a Na'vi. I used Photoshop -- twice. I'm not a Photoshop genius -- and more like a noob -- but all I can say is combine either Jake or Neytiri's face (whether if you're guy or a girl) with your own. It takes a lot of time and even more patience.