Karin, there are numerous tutorials on Adobe.com. Get familiar with the site and browse around. Use the Search blocks to enter what you are interested in such as Photoshop Elements 8. If you don't have a User Manual you can get one there.
Copy this long url and paste it in your browser .. it may just be what you are looking for:
Also lots of PSE 8 books and when you can upgrade tp PSE 9 .. it is an improvement.
Best of good wishes for lots of fun ..