You will face a two-tiered challenge in acquiring the D7000. a) where are the buttons I need to push. b)how can I tailor the camera to my preferences.
Challenge A can only be learned by your fingers. And this takes time, so you aren't fumbling. "B", setting preferences, such as for contrast/hue/intensity actually takes more time, but is secondary to using the camera. You have simply got to start firing off shots to learn.
A close Nikon friend owns the D800 and says the menus are far more deep than on mine. But, they are subtleties for the most part. You can take a perfectly good picture without going through deeper and deeper menus to adjust these things.
When I bought my camera, I went to visit a close friend who is a still photographer for the movie studios in Hollywood. In his back yard he began to give lessons. He continually warned me to look through the viewfinder and at my subject. I tended to fixate on menus appearing on the LCD back screen. To repeat, how good is any camera if you miss your shot.
When you tackle something like a wedding, operating the camera has got to be instinct. Or, you'll miss the shot.