Very quickly, go ahead and take a look at the Windows Phone 7 training kit. A few days ago I shared the article announcing the final dev tools, but now I'm pleased to share the training kit info. It will help you cover the basics and even build a small game for your phone. I have to jump on that myself, but meanwhile, I hope you get the tools and the material so you can cover the basics. There are several links to Channel9 training videos and a very comprehensive list of useful information.