Very First Painting

I have never painted before. Ever..well except the paint by numbers and such when i was a kid. But now I have decided to teach myself how to paint and I am using acrylic paint on a medium sized canvas. I have a thing for super mario so I drew a giant Goomba about to smash mario, and mario is running away, and in the background is the typical mario background.  I am hoping that this painting turns out because this would be a very cool painting. I am a total nerd.