The fan brushes are good for different techniques, depending on their properties.
A natural hair fan brush is used especially for blending, smoothing, feathering.
The synthetic fan brushes are used for clouds, leaves, trees and also textural effects, for grass and fur.
Here you can find a few tutorials on how to use your fan brush to get the most out of them.
Some of them have been very useful for me too, when I started to paint, as I learned a lot from YouTube tutorials.
Thank you for your beautiful and very useful training materials !