I started writing fan fiction when I was about 14 years old. I can barely read what I wrote, I just cringe too hard.
In years 11 and 12, I did a writing course over the two years. At the end of the first year, my writing was still pretty terrible, but at the beginning of the second year, there was a huge improvement. My writing has continued to improve onwards from there.
My honours thesis has to be the best thing I’ve written so far. It is a clear difference from what I wrote at the beginning of my undergrad, which is also a significant improvement from my first fan fictions.