I highly recommend reading this blog from the very beginning. He starts out REALLY simple and gently leads up to the more advanced stuff like helicopters. It's

I highly recommend reading this blog from the very beginning. He starts out REALLY simple and gently leads up to the more advanced stuff like helicopters. It's given me enough confidence to do some of my own stuff and I'm getting better. Also, once you've followed the blog, try copying from other people like Angry Birds to see if you can recreate it. It's surprising how many game assets start to look like collections of simple objects whereas before you thought "how did they do that? They must be just brilliant."