My advice: If you want to write, don’t ask for anyone’s permission. Listen to the inner voice that’s telling you that you have something to say and no one but you can say it. If that voice is loud enough, it will drown out all the others.
Consider for a moment that your story is an important one and that you’re the only one who can tell it.
Only you know how you continue to struggle or how you’ve overcome your struggles, or both. Your story will help someone else find their way, or get through something they think is unbearable, or simply escape from real life for a little while.