Don’t take this the wrong way, but my suggestion for a one week novice would be to slow down and learn the basics. You’re jumping into a pretty complex problem right off the bat without knowing how to accomplish the basics. If you haven’t seen this post yet, it should be a good starting point for a potential isovist solution. However, you will be much better off going through the Dynamo Primer and learning the basic nodes and functionality of Dynamo before jumping into something like this.