How did Janet become FG's apprentice?
A good question! I've decided that Janet is a young human girl who's parents died when she was a baby, and she was left in the care of her old grandfather. He knew he didnt have much time left either to take care of her, so he called on a Fairy who he'd met and aided in his younger days and asked her to find a good home for Janet.
The Fairy Godmother had never been able to have a child of her own, though she'd helped many, and she saw that Janet had magical potential, so she decided to take her under her wings (so to speak) and train her herself.
So Janet more properly would be a Sorceress/Enchantress according to the worldbuilding of the DisneyVerse as she doesn't have fairy blood herself but she's still training for basically a fairy godmother position.
Credit for og illustration to Oskar Herrfurth, for the fairytale "Marienkind or Mary's Child" by the Brothers Grimm, where a young girl is raised by the holy Virgin Mary










