So start with soccerfina...maybe trying to convice zeus to let her go down to Earth to teach a bullied kid (who is bullied because hes the only kid in the village that doesnt know how to play soccer) how to play soccer!
Or..
Soccerfina could be trying to find her true self and why she exists. Shes trying to find her purpose as a goddess. (So your story could be how she finds her purpose.)