As joel says, trying to teach someone how to use a camera you've never used your self over the interwebs is never going to happen.
BUT.. if you're taking pictures outside, if you put the camera in A (aperture priority) and set the aperture to the desired level, the camera will set the shutter speed for you automatically.
if you're not sure what to set the aperture at, the lower the number, the faster the shutter speed will be, but this means you will have less depth of field (blurey backgrounds)
a higher number will mean more bits are in focus (stuff closer to you and stuff further away) so for landscapes, you would use say F9 and for someones face F1.7
how ever you set the apeture, if you are using the camera hand held, you dont want a shutter speed and slower than 1/60th, if it is, you can raise the ISO to a higher number, this will keep the picture sharp, but make it grainy
if you are taking pictures underground, you need to shoot in full manual mode, and it will be hit and miss untill you know the camera, but as a rough starting point, in a metal mine, ISO200 - aperture F8 - shutter speed 4 seconds, and dont forget to manual focus (if you can, if not good luck, but speak to seantaylor, he cant manual focus his camera either)
if the picture is to bright, shorten the shutter time, if it blured close by, but is ok in a middle distance from you, up the F8 to say F10, but then you will need to increase the shutter speed a little bit
if it's to dark, light it better or increase the shutter time another couple of seconds..
it really is hit and miss untill you know your camera.
i've taken over 10,000 underground shots with my camera, i still only get 1 in 3 pictures that are useable, but i can get the camera out, get my picture and pack it away again in less than 90 seconds, i HATE waiting for people to take pictures when they are faffing about for like 10 - 15 mins every picture.