Congratulations!!!
It comes fast -- mine shipped within 24 hours, and then I had it two days later.
If you are getting Tmobile, you might want to consider ordering the sim now. Tmobile sims ordered from their website take something like 5-8 business days, and mine took the full 8 BUSINESS days, so it was more like two weeks. I would even consider just paying the $12 or $15 for overnight shipping, (I wish I had) so you can track it. Google gives you 14 days to return, and even though I never would have returned mine, I still wish I had a functioning sim card during those first 14 days just in case.
The N4 is a glass slipper. I wouldn't go naked (Opinions differ on this matter). Get a good case.