I made a mediocre attempt at Livebrush.
-snip-
Any ways I could improve this?
It's a guy in a top hat I messed up talking on a phone.
Try using the "smooth" brush. It a little ways down on the list. Also, if you want to export the image transparent, you can select all the layers but the bottom ones and go to File>Export>Export Layer(s) to Image
What I do is delete the paper looking layer and change the black layer to white.
I did my signature real quick with the smooth brush. The faster you draw, the thicker the line. It doesn't like sharp turns very much:
