(slang) remaking oneself to be conspicuous (more social, etc.) upon entering high school

(education) high school; senior high school

a debut / (by extension) getting started

to make a debut, to come out for the first time

(literary) they (about women or girls)

(colloquial) a girlfriend (a female partner in a romantic relationship)

(formal) Female third-person singular pronoun; she, her, girlfriend

succeed / be successful in life

success / success in life, achievement in the world

(literary) they (about women or girls)