im not ready to grow up. what should i do?

i’m 17 and i recently started picking out colleges that i’m considering going to, and then it dawned on me that i’m actually growing up. it kinda hit hard, i feel very sad and unprepared. i keep thinking about how i don’t feel ready to make these big decisions everyone wants me to make, ive spent my whole childhood having fun (which im grateful for) and figuring out who i am and i feel like i haven’t had enough time to be ready to go into the real world. i feel like adult life is much harsher and judgmental, i feel like people will judge me for not being where i should be at when im an adult. i seriously don’t know what to do and im running out of time. any advice?