I'm so glad you stayed in the kiosk for the rain, I really like how it feels when it rains in there too :)
You are not the only one who got stuck on restocking. Other players told me the same, so I already changed the start of the main game: in version 0.4.0, Claudia, the old owner of the kiosk, stays with you for your first days and shows you one thing at a time. I'm not allowed to update the jam version while the jam is running, so you played the old start here.
If you want to try the new start: https://kigaro-games.itch.io/kiosk-days
Can I ask how far you got on St. Martin's Evening? And did the restocking cost you a lot of time there? I would love to know if the goal is too hard or if the game just doesn't explain it well enough.
And yes, every char really comes from a Python script :D The AI writes the scripts, and I listen and say what has to change.