Big life changes bring butterflies, whether it's setting off for boot camp, getting married, starting a new career, first day of kindergarten/high school/college/grad school, whatever. You're heading outside your comfort zone and if you weren't nervous I'd be concerned.
Best of luck to you, you sound like someone who has his head screwed on straight and knows exactly what you are doing and why. That's a rare thing to find in folks of any age these days.
:You_Rock_Emoticon: :usa: