Digital drawing of a Skull (First Attempt)

LOL! My first attempt at digital drawing/painting (whatever it is) using the Paint Tool SAI program.

I can draw okay in real life its just I'm not to sure if I should upload pictures taken of my drawings xD

I have absolutely no idea on how to use this program so I tried messing around with various things to get this result. I still don't know how to color or even draw properly on the program but this is my first attempt so yeah xD

Ohh by the way I used my awful mouse to create this. I want to buy a tablet soon and start creating digital paintings/drawings so that's kind of why I attempted this ummm artwork....

Haha the quick banner I created looks better than the skull xD Also I have been drawing skulls like this for my art subject this year so its something I am familiar with unlike the program I hope i can get a tablet soon so I can start creating a lot of digital drawings/paintings of various things !

Programs used: Paint Tool SAI and Photoshop CS5

I shall keep practicing!!!