firefighter11, i use photoshop and illustrator for a living and here's what i always tell people about photoshop:
photoshop is just like a mechanic's toolbox full of tools. there's nothing really magic about the tools themselves; anyone can learn how to turn a wrench or twist a screw. what the mechanic has going for him is the knowledge and experience of knowing which tool to use in a given situation.
just as you can buy a book or watch a video on how to re-build a carburator, you can also buy a book, or watch a video, or read an online tutorial on how to use the different tools, filters and effects within photoshop.
if there was a specific project you wanted to know how to do it would be easy to walk you through the steps, but asking a blanket question like "how do i use photoshop" isn't specific enough to have a specific answer.
google "photoshop tutorials" and hundreds of results come up. look through them and try a few of them. in no time you'll gain experience on how to use the different tools.
i realize this wasn't the answer you were looking for, but i hope it helps.