This course has an intermediate level and it is expected that you are familiar with the user interface of the Blender program, know the principles of 3D modeling and be familiar with material nodes (shaders).
Chapter 1
We'll start with the basics of Nodes in the Blender app.
Chapter 2
In this chapter, the most important and most used nodes are taught. Nodes that you will use a lot not only in this tutorial, but also in the size of the projects.
Chapter 3
In this chapter, we will learn how to create a roller coaster and how to move the roller coaster along this route.
reference:
http://cgcookie.com/courses/assemble-introduction-to-procedural-modeling-with-geometry-nodes-in-blender