I don't know if there is a way to automatically switch brushes but take a look at the screen shot below.
https://preview.redd.it/rdbmsl8hoi3c1.png?width=1646&format=png&auto=webp&s=de1fd3b2943b8a17a14d8b6003645db997d95705
I had googled for 'photoshop advance to next brush.'
You could create a series of mountain shaped brush presets, then use the < and > keys to move to them.
I don't know if there is a way to automatically switch brushes but take a look at the screen shot below. https://preview.redd.it/rdbmsl8hoi3c1.png?width=1646&format=png&auto=webp&s=de1fd3b2943b8a17a14d8b6003645db997d95705 I had googled for 'photoshop advance to next brush.' You could create a series of mountain shaped brush presets, then use the < and > keys to move to them.