I know how to add ready texture from disk and how to connect it to normal map input, but i dont understand how it let me paint normal texture 
If you are sure that you know how - please give me more details.
Also i don’t know how to paint height map, what is workflow for that?
Is there a workflow for painting indyvidual textures as albedo, normal?
If i understand correctly Armorpaint let me paint with materials not paint indyvidual textures of these materials. Is this correct thinking?