My advice is to keep writing. I started writing fanfiction, stories based off of characters from books/TV shows/comic books etc, when I was eleven. I gave them to my teacher to read as journal assignments, writing three a week. Most of them were one or two pages at most, but I was very proud of each one. My first original character was a kid named Jake Clue. He was a ripoff of Jigsaw Jones and Nate The Great, but I loved him. He was mine.
I continued writing even after I went from fifth grade to sixth where I gave more stories to my sixth grade English teacher. My English teacher suggested I look into publishing. From there, everything took off. I looked into it from the next three years. My homeroom teacher in eighth grade even let me have a whole class period to myself every day for a few months to devote to it. The class I was supposed to be having, Tech-ed, was difficult because of my disability and having trouble with fine motor skills and this was an amazing substitute!
I tried my hand at traditional publishing for five years, but when that didn't work, I turned to indie, or independent, publishing. Indie publishing makes it harder to get noticed, but it's very rewarding knowing you published something. It took me nine years, but I finally published my first novel and I couldn't be happier!