Is my story any good?

I'll applaud you because your story is very long and detailed. I read a couple of sentences from the beginning though. Your story is repititious and tedious since their is no action. For example, instead of starting with the main character thinking about his name being called, you can say, "Even though the heat was a blistering ninety-four degrees, I listened intently for the announcer to call my name. Nothing was going to stand in my way of winning this championship." Your story is tedious because you're always narrating in the first person. Instead of saying, "My mum left me some clothes in her car so I didn't turn up in sweaty overalls; I ran out to the car park with my mum's car keys and unlocked her car..." You can say, "Panic striken since I forgot my clothes, I quickly ran to my mum's car, unlocked the door, and grabbed all my clothes." I know this is a fictional autobiography, but you do not have to start all the sentences with "I". Hope this helps and good luck!