"Edda: A Little Valkyrie's First Day of School" by Adam Auerbach

This little Valkyrie is leaving Valhalla to attend school with children her own age but she's not ready for the very different reception she receives as just one of the kids. In Valhalla, she is important and catered to but on Earth she's no more special than anyone else. Things don't seem to be going so well until Edda starts writing about her life in Valhalla, then things start to get better quite quickly as she enchants the other children with tales of life among the gods.