Problems with Layer and Brushes

[SooniX]

Hi,

I love Paintstorm so far, because it has many things that other programs do not have.

My problems
1. When I move from Layer 1 to Layer 2, Layer 2 does not display any color, it remains white. What is wrong there?
2. I have various abr files installed: Djahal rock 2009 abr and Djahal vegetal abr, but these were selected, but not executed.
Free Photoshop and Gimp Brushes by Jonas Dero abr were not installed. But I would like to have these in my Brushesbox.

And I have a suggestion:

It would be nice if it were possible to change quickly between two or more brushes. For example from a to b or c and then back to a?

[support]

The layers are transparent at the creation, the white is just a background behind an all layers.

What about ABR see this tutorial:https://www.youtube.com/watch?v=YyYx73d_lx4&t=20s

[SooniX]

I had hoped for a more differentiated response from you. Your very general answer does not help me much.