There’s no correct order, you can do any way you want.

First the style and background to set the basis for the whole if if the most important thing for you is the style in which the image is drawn. If the most important thing for you is the foreground and the character, then the character description first, and only after its appearance and actions, and the style is at the end. Well, in general, you can probably just mix it all up and scatter it. But it’s better to have a structure, since the generator model uses a token system to draw, and the most important thing should written at the very beginning