747 people have taken my online Introduction to Arduino course on Skillshare, and the class has a 95% positive review rating. The entire video course runs a bit less than an hour, and I explain what Arduino is, what you need to use it, how to get started, and how to build some simple projects. No knowledge of programming, engineering, or electronics is necessary. The class focuses on hardware to get you using the board right away.
I also have another class on Skillshare called Introduction to DIY: Becoming a Maker. Below are intro videos to both classes.