Unfortunately it is very difficult to get photos to look the same on the camera, printer, and screen - they all render colors differently.
One option that is easier than Photoshop is to look for a program in your applications folder called iPhoto
. You can load the photos into it and then "Edit" them, where there are some easy enhancement tools that can make them look better. This does a pretty good job for basic manipulations. iPhoto also has excellent support for burning photos to CD, printing calendars, etc.
If you want to continue with Photoshop, I highly recommend picking up the "Visual Quickstart" guide for your particular version of it.
Before you do this you might double-check the version of Photoshop that you're using, as version 1 is pretty old and they are well beyond that in version numbers now. You can find this information by going to "About" in the Photoshop menu.
Photoshop is a pretty heavy program to learn, so another option is to pick up "Photoshop Elements", another piece of software that has a slightly easier user interface.
I hope this helps! Let me know if you have any more questions. Kind regards,