I am unclear about her initial motivation for leaving earth – ?assuming this is where the story begins?

Was the purpose of her leaving to seek this wand? Or did the wand become relevant after she becomes involved in the war of witches? If the latter:

A faithless young farm girl seeking her life’s purpose travels to a galaxy of advanced science and magic, becoming caught between a war of witches.?

If the former: Does the girl choose to go to this galaxy or is she forced there?

A faithless young farm girl seeking her life’s purpose ?is swept away to a galaxy of advanced science and magic to seek a legendary wand ?after she?becomes caught between a war of witches.?