Chech out Adobe TV (free) and lynda.com (not free but a good value).
http://tv.adobe.com/show/learn-photoshop-cs6/
You should be aware that Photoshop is a professional-level application that makes no apologies for its long and steep learning curve.
You might want to check out "Photoshop Elements" too, which is less complicated, much cheaper than Photoshop proper, and has many hand holding features.