Hi Steve, 

You are not the only one being a bit confused by the Vision Board. It is a fairly new feature and it still has teething problems. 

The squares on the top right are like a toolbar. You choose what type of card you want to add. Then you after having selected one of the options, you can double click on the board and it should add a new card for you where you can add text. 

The Vision board is a free form way to visualize your life and goals at a higher level. You can visually group projects together and see clearly which projects are more important than others.

I am considering removing that feature altogether as many users are confused by it.