If I get under-eye filler, my eyes will look softer, right?

Even when I smile, let alone when I'm still, I completely lack the plump under-eye bags that usually appear right beneath my eyes. This makes my eye shape look particularly flat and sharp. Because the area under my eyes is so flat and empty, my eyes actually look much smaller, and I get stressed because I frequently hear that my first impression is cold and unapproachable. Even when I try to draw under-eye shading with eyeshadow and add glitter to create the look, the flatness is always obvious when the light hits it, making my makeup look artificially thick. I would like to get under-eye fillers that add just a subtle amount—about 0.1cc—to create a lovely, plump eye look when I smile. Since the skin under my eyes is thin, I was worried about severe bruising or a bluish tint. If anyone has had fillers that settled naturally, looking just like their own skin, please let me know.