[How do I do the texturing and shadows in this?]

Thanks! That's what I needed.

[How do I do the texturing and shadows in this?]

How do I shade my isometric design like on this picture? I want to know the exact name of the brush used for the shadows & the texture, and I also want to know how do you draw the shadows etc. I'm a beginner with Affinity but not with design. For example, my design currently looks like this (vector only):

 

But I want to go to Pixel Persona and somehow do this: