Can a 16 year old enroll himself in a high school?

I’m a 16-year-old and was wondering this because I’ve been being abused for about 5 years and have just within the last few months realized that I’m being abused. I’m gonna run away there’s no way to stop me and I actually have abutted 4–5 questions

can a 16-year-old enroll himself in high school

how long till nobody recognizes me from an amber alert

should I go to my trusted friend/adult (who i feel won’t snitch me out) after I get out

will I get hired anywhere

can I go back to my school after a week
I’m suspended and have 4 more day’s to go but then i was thinking maybe I should wait a week before going back to school