You might think your the sh!t at computers because you made a web site, but you have to consider the company's point of view on this. Your a 15 year old kid, and you can't really prove your skills to them, so yes you did take a chance. You even said that you had never set up a Server before they hired you to do it, so they're concerns were probably justified. If they had hired a pro, he would have had it finished in probably half the time (if he was being moral, hehe). Just consider it experience and good reference material, its not like you have to pay bills or anything right now.