While I quickly beg for help.

Alrighty, guys.
I just started using the photoshop I have.
It's cs3 extended.

I know how to do a couple of basic things, but I'm still desperate.

Mainly, the first thing I want to learn is signatures.

I've looked for helpful tutorials, and only found a few. Besides, that, I'm lost.
Any tips + advice, and/or tutorials that I should watch?
It would REALLY be helpful.