Okay, here’s how I think my first few days with them would go:
Twilight Sparkle: I would read to her at bedtime every night, and help her in her magic experiments.
Fluttershy: I would bring her to an animal farm, let her go to the young animals (like puppies and chicks)
Rarity: I would carefully help her with her sewing, making sure she doesn’t hurt herself (while keeping her outfits as lovely as she wants)
Rainbow Dash: I would bring her to the park to throw a football, and she would speed off to bring it back to me.
Pinkie Pie: I would help her make cookies and treats, being careful to keep her from touching the oven.
Applejack: I would bring her to an apple orchard, where after a day of picking and eating apples, I would help her plant a few apple seeds for her own.