Take a look in the forum for a "Good Links" thread.
I placed a couple sites that have loads of great brushes to download.
When you got the brushes, put them into the correct folder (Photoshop>>Presets>>Brushes) (I think) and the open up ps. Select the brushes you downloaded and experiment.
Check out the sig tutorial to get an idea of how to create sigs.
pretty nice m8 keep trying and you will get better, just mess around with brushes and filters, how i started doing brushing was to just use the clouds filter and add other filters on to them and mess with the layer styles : D :good: