It's important to accept that not everyone will have the same reaction, but that's okay. Focus on those who will appreciate it. Try to see sharing your story as a form of self - expression and growth. You can also join a support group where people share similar stories, which makes it easier to open up.
You can practice in private before sharing publicly. Write down your story and read it out loud to yourself. This helps you get more comfortable with the words and emotions. And think about the purpose of sharing. If it's to inspire or connect, that can give you the courage.
One way is to start small. Share your story with a close and trusted friend first. Their positive reaction can boost your confidence. Also, remind yourself that your story is unique and might help others.