Choose a new name for yourself and decide which pronouns you want to use. Find the moments in your life that give you gender euphoria and really embrace them.
You might come out to a family member or family friend who’s supported you since you were a little kid. They can help you figure out how to come out to people who may not be as accepting.
Talk to a supportive grown-up about safety. They have talked with lots of grown-ups and know a lot about the community. So they might know better what is safe.
Think about posting on social media. This is easy to spread, but you also might worry about your privacy now or in the future. If you want to use social media, have an adult help you. You might want to come out during school. It’s important to meet with your teacher beforehand so that it can be planned in the day.
For example, you might say “When I was little, people thought I was a boy. But the truth is that I’m a girl. I need to be myself in order to be happy, so I’m not going to pretend to be a boy anymore, and I’m going to act and dress like the girl I really am. Please call me my real name, Jessica. "
Ask your family to set up a meeting with your teacher to talk about coming out at school. Your teacher may be willing to help you come out. For example, the teacher might read the class a book about transgender children, and then say that you have a special announcement to make. If the teacher is willing, you might be allowed to bring cupcakes or other food to celebrate you coming out. People might be especially receptive to the news if it comes with a tasty treat!
Your family members and closest friends would probably prefer to hear it in person (or over the phone) instead of as a general announcement. Telling them personally helps them feel like they are special to you.
Be careful of the comments section if you come out online. There are bullies and rude people online who might write mean things. It doesn’t mean that what they say is true.
Wear the clothes that you love to wear, in a style that makes you happy. Keep in mind that girls (including trans girls) are allowed to be tomboyish, and boys (including trans boys) are allowed to like feminine things. Wear the style you like: sporty, nerdy, tomboyish, girly, cute, stylish, weird, or whatever feels right to you.