what to wear to a job interview as a 15 y/o?

i got an interview for dave’s hot chicken (fried chicken place) and a cafe that has to-go drinks like matcha and lattes and stuff like that.

my parents opposed me wearing **slightly** baggy black jeans and and a navy blue long sleeved shirt but instead wanted me to wear black flared leggings & a tan button up.

i feel like for fast food it’s not that serious, i think i just need to look presentable and clean. thoughts?