I'm a 16 year old .?

It's up to you if you want to come out or not. It just when you feel right about it. Some people come out when they're older. Some people come out when they're younger. Also, whoever made you think that you need to cut your hair short is wrong. That's stereotypical. You can look however you want to look. You need to talk to a friend or family member who you are comfortable with.