Yes, that’s correct. You can even get a little closer, and it would be better if you have a well-lit background behind…

Yes, that’s correct. You can even get a little closer, and it would be better if you have a well-lit background behind your subject (it will appear dimmer but fill the black void) or if your subject is right next to a surface that could also be lit by a flash (like a wall, plants, etc.)