Also, while you are reading the on line manual waiting for your flashy
red KX to come, here is a camera simulator to play around with, that along with some of the web sites may help.
Aperture, shutter and ISO value | SLR Camera Simulator
A couple of things to look at...
aperture - take a look at the right hand side next to the aperture slide and you see a simulated aperture. take the slide with your mouse and move it back and forth. Note that as the opening get larger the f stop value gets smaller, and the picture goes from over exposed to under exposed. This controls the amount of light the lens lets through into the sensor
Shutter - this is the amount of time the shutter is opened letting the light in from the lens. Aperture coupled with the shutter are 2 of the main controls. Note that you can check the link aperture shutter [box]. what this does is as you modify one - ie aperture, the shutter value will automatically adjust so that the picture exposure remains the same.
ISO value - this controls the sensitivity of the sensor. So if you open the aperture all the way wide open and expose for a long time, and make the sensor very sensitive (high value) you get a way over exposed picture - unless its very dark out and then it looks maybe ok. Make the sensor less sensitive, and the quality of the image gets better.
So what you can do is play with all of these and start to get an idea of the inter relationship of how each of these affect the other two.
Also note - that when aperture is wide open (small f value) the background is some what blurred,and when the aperture is stopped down (smaller opening and larger f value) the background becomes much sharper.
so enjoy!!!