I have been using Unity3D since day 1, on the Mac, and have seen it evolve into a fantastic engine. I have kept up to date on all the new features, and consider myself expert standard on some of the things you will be learning about. I have used C# since .NET 1.1, and it's fantastic to be able to the power of the language in a game development setting. You have made a truly great choice in engine!
I will direct you through the 7-day learning process, including the details behind the scripting system, the basics of it, and then move on to more complex applications. By the end of the process, you should be in a great position to make a simple game. I will also direct you to tools and websites that will further aid your study, if you need a second-opinion on certain matters of confusion.
I hope that the time and effort I put into scripting Unity3D will be useful to you, if you choose to accept my bid!