Fictional Autobiography

It sounds like they just want a fiction story with 1st person point of view, where you draw off of personal experiences in the work. For example, don't write about being afraid of heights if you aren't, but if you are terrified of spiders you could used that in your fictional story.

I think Zoe has the gist of it. I would struggle with this, as there isn't much I'm afraid of (a slow, painful death is one of them, but it's not exactly a fear that can be conquered).

Why not do something like: Ever since I was little, my brother/sister/cousin told me there was a monster living in the lake near the cabin we stayed at every summer. Although I could swim well, I was afraid to go into the deep water of the lake... until one day I saw a kid/puppy/friend/whatever struggling to stay afloat, and I had to put aside that fear or watch the kid/puppy/friend/whatever drown.

Finland isn't exactly short on lakes, so something like that should be feasible. Better if you could work a real fear into it somehow, but if your fear isn't a tangible thing which can be overcome, you might have to make something up (lake monsters FTW!)

There are lots of ideas for a fictional autobiography.

For instance, take something important or dramatic that has happened to you. Now, set the current scene, then extrapolate into the future. Think of any prediction you might have as a consequence your actions in the present, then you develop a turnaround in the future.