What is a good resource to use to learn PS 7?
Depends on your knowledge of PS. This forum is a great place if you already know the basics.
Otherwise, your local community college probably has a Level I and Level II course, or there's literally dozens of popular books on the subject.
On the web, hundreds of people have tutorials on how to do this or that. Learn Google <http://www.google.com> or any other good search engine and query "Photoshop [fill in the desired effect] Tutorial."
However the only way to get good is practice and more practice. Do you work with PS professionally? If not, switch to Photoshop Elements.