If you are very new, as we all were, I think you would be better off starting with a mid-range camera and a couple of good lenses. Then when you can shoot really good with that camera but still want better, keep the lenses, sell the mid-range and buy your D3.
I don't say this to belittle your enthusiasm. More to keep it going as the D3 will probably be too complicated for you to take advantage of and then when you're disappointed you might be inclined to forget photography.
There is jargon in photography and technical terms, but every one that is serious needs to know what the terms mean because when you do and can apply what they mean to your photos, then you get quality.
Knowing how your aperture setting will affect your photo or how increasing the iso affects it will make all the differance in whether you take great or mediocre shots.
And that's the easy stuff.