If you contact a Westalee dealer they will tell you exactly which foot you need for your machine. That is helpful. It also comes with a ruler with a straight and rounded edge and a spacer to get you started. I used that for a long time before I bought the starter kit and took the class. I recommend you take a class once you get into the more detailed rulers because there is a lot to learn to really get the most use out of them.
There are a lot of YouTubes that you can start with, as well, with the basic straight and curved ruler.
Watson