...I convinced my parents to let me get a scene hairstyle but they won't let me get it bleached which is so important for this style. How do I convince them? My hair is dirty blond now and they said I could only get highlights. I'm NOT happy with this as it will not look good! Help!
You keep acting like a child, they will keep treating you like one.
18-24? You're legally an adult now.
Try speaking to them maturely and in an adult manner about your wishes. They still won't budge, maturely accept it, maturely get a job, save up, and maturely move out and start living your own life the way you want to.