Big school is a major milestone, but small habits make a big difference. Try...

https://blogfreely.net/margaret-bennett/mastering-independence-a-practical-guide-to-teaching-buttons-and-zips

Big school is a major milestone, but small habits make a big difference. Try practicing opening lunchboxes, following two-step instructions, and taking turns with games at home. These skills help your little one feel capable and calm on their first day