Congratulations on all your new stuff. I know this can be a very daunting thing but hang in there.
The first thing that I would do is buy a book for CS2. Take a look at Scott Kelby's book for CS2 for Photographers. Great book with step by step instructions.
Next, I would start shooting RAW. Why RAW? Well, it offers you more flexibilty if things go wrong, and they will. While you are learning how to take pictures the best that you can it is nice to have a little more leniency if you mess up, like with WB or exposure.
Also, only work on a duplicate copy and not the original of your image. This way you can always start over if you need to (although with RAW you can always start over because you can not save over the original file).
Now, there is no single method to editing your pics. Not all shots need the same thing either. So it would be difficult to tell you how to edit your pics. There are certain things that are typically done to each photo though adn these would be levels, curves, and sharpening.
Levels (look under Image > Adjustments) - set the level of your white point, black point, and midtones. There are several ways to accomplish this, either by dragging the sliders or using the eyedroppers.
Curves (again under Image > Adjustments) - set the black point, white point, and grey point for contrast and color. Here you can use the curve to select points for adjustment as well as the eyedroppers.
Sharpening - This is the one step that EVERYONE uses at one point or another. Save it until the final step of your workflow. There are too many methods to comment on here but Unsharp Mask (USM) is the most popular method of sharpening and found under Filter > Sharpen. Do a search for favorite settings.
