How can i give myself a complete makeover?

its currently summer break and ill be going back to school in a few months, and when i go back i want to look and have everybody just be like oh wow im going to be a highschool freshman. i have medium length straight dark brown hair, and green eyes. im 5ft 2 and i weigh 94 pounds. im bored of my normal self. so any ideas on how i can give myself a complete makeover? and dont say be myself, cause im not doing this for a guy or anyone else, im doing this for me. thanks.