Unity Development Courses- Partical Systems

Started on the Dev Courses and it's been awesome. Right up to Chapter 15 on Partical Systems. I try to follow along as I go but there's no way to keep up with this one, creating Attack modes, Interface for Effects, etc. Is it just me or did/has anyone else had difficulties keeping up with this section? It's almost as if you need to know this before taking the course. I can get the ideas and working with a well as locating the tools, but like I said, following along and trying to recreate it I Unity as he goes its crazy. Am I supposed to see this more as an overview? Do I just need more coffee??!!