any advice appreciated

hey guys, I'm sorry if there's any incorrect grammar, I'm a little bit drunk and feel bold to type this. I've always had an interest in becoming an author, I've always enjoyed writing fictional stories and writing poems about my mental health. In the future, I plan on writing a book/poem book about mental health. I don't know how to even start doing this. I'm sorry if this sounds uneducated, but I'm very young and I don't know how to even start to write a book or something that would be able to be published. Does anyone have any advice? I appreciate anything thank you so much for reading this and I really appreciate you.