Dynamo is hard to learn. There, I said it. But, it is useful and worth learning. To get started you can watch my presentation from Autodesk University 2016. It's geared for people who are not geniuses, like me. Reason I say that is most of the classes and videos I have watched get very complicated, very fast. This class has been designed to get you through that initial steep learning curve in about 60 mins.
Click here to watch the presentation and download the datasets.