Don't be afraid to draw. I can't draw either so I make a lot of circles, lol. You can always erase what you draw right away if you don't want to share it.
The best way to learn is to start clicking your mouse and play around with it!
Ooops. Just noticed that ours doesn't have a Clear button so you have to erase by "Undo" or coloring over the board with a new color.