Before you invest money in a class, find out what it offers and what you may learn there.
Photoshop is an immensely powerful application and in my mind somewhat misnamed, it is often used for creating illustrations rather than "processing" photographs. Many courses(and books) concentrate on this aspect.
Make sure that any course or books you invest in lean towards the photography aspect of Photoshop. Authors to look out for include Scott Kelby, Tom Ang, Katrina Eismann.
tutorial that Tommy mentioned may be OK
but I would like to see a review of the entire product before endorsing it.(Perhaps the authors might be interested in having an experienced A.net contributor do a review of the product) I personally have suspicions about a training product like this designed for a single quite narrow outcome.
Search the internet, there are some quite good tutorials available there!!
[Edited 2006-01-03 23:05:25]
If your camera sends text messages, that could explain why your photos are rubbish!