Using this Mariah Carey Barbie Doll is super easy. First, take it out of the box and be careful not to damage it. You'll find that the doll can't stand on its own, so use the included doll stand to display it. Place it on a flat surface where you can show it off, like on a shelf or a table. As for maintenance, keep it away from direct sunlight to prevent the colors from fading. Also, avoid getting it wet as it could damage the doll's materials. If it gets a bit dusty, you can gently use a soft, dry cloth to wipe it clean. And remember, since the colors and decorations may vary, each doll is unique, so enjoy its special features.