VeloceMoto,
Yes, depth-of-field is controlled via aperture (
http://en.wikipedia.org/wiki/Aperture). I have exactly the same camera as you do and trust me one on fact: It is an awesome camera for any beginner given the fact that it is cheap now. If you want to get a quick start, set the camera into the aperture mode by turning the left knob until A matches the selection. In this case you will set the aperture and the camera will detect the best shutter speed for you. For most of the pictures you want to use F7, F8 or F9 since that is where lenses are sharper. Get a tripod and learn how to use the camera on a tripod and that way you don't have to worry about shutter speed. To avoid jerking the camera get a remote control or use a timer. Compose the picture, set the timer and you're done

That way you don't have to touch the camera.
Lesson #1. Take the same picture with different aperture settings to see what is going on.
Lesson #2. Learn how to use GIMP or Photoshop.
Lesson #3. Calibrate your monitor so the color adjustments that you do show up on prints exactly the way they show up on the monitor that you use for work.
I think that you'll be all set. One more thing, you should probably get an extra battery and a card reader that you will use to upload data into the computer. If you don't use the card reader, the camera's battery will drain fast. You will need an extra battery if you want to shoot in colder weather (batteries drain fast as well). Finally if you plan to ride and take pictures invest in a good backpack and figure out how to mount the tripod to your Superhawk.