http://www.nikonchat.com/nikon-beginners/

The Nikon D90 is a good camera for beginners like me?
It's my first camera … So yes!
Since I decided get a digital SLR that have committed to a camera that is slightly larger and more complex than a point-and-shooter. But the image quality and control over The end result is what makes this so interesting. If you plan to keep this camera for a few years and you may be interested in getting some other objectives, the D90 is a absolutely brilliant camera. T does not have most of the D300 or D3/D700 expensive, but good shots taken with a D90 are highlighted. If you are unsure, you can go with the 5000 it's a little less complex but also less versatile. I really should hold a D90, look through the viewfinder to take some pictures and compare with others.
Nikon D90: How to use for beginners