Please tell me how to create a natural contouring look.

Please tell me how to create a natural contouring look.

Are there any products that provide good, natural-looking shading without being too excessive?

How can I do contouring to make it look natural?

Does contouring make the face look more three-dimensional?

I haven't even dared to try it because I'm afraid it might go overboard, but I'm curious~