I'm only about 30% of the way through, and I was frustrated because I still didn't feel like I completely understood it, but Dave said, "Don't worry too much if you don't understand it yet. The fact that you've taken the class this far means you're interested and you understand it to some extent." (something like that..), and hearing that gave me a lot of courage 😊😊😊😊 I'll understand it better each time I repeat the lessons, right? It's difficult, but interesting and so much fun! I'm still at the very, very, very beginning, but I'll study hard and master it!