Wow, heck, that by itself makes for its own novel O.O
I started drawing comics from before I have memory, but I didn't write long format novels until 2012-13, I think. I was depressed back then so my memory is fuzzy.
I had something started, but there was a huge turn around in 2013. At half an hour from leaving the house to go to a music history exam that would decide if I pass or not the whole subject, I looked up from my notes, frustrated because I had read the same line half a dozen times; and in a total "fuck it!" mood, I grabbed my laptop and started writing what would be my first complete novel.
I think that was the last exam I took that year, and I spent the whole summer just... writing that novel. I moved, deleted my social media, put many people out of my life and started the journey to discover who I am.
I finished that novel, yeah, but it's a complete mess First and only time I read it over to correct, there were paragraphs that didn't make any sense even in terms of sentence construction.
It's natural to have a lot of stories unfinished, I have around 20 and have only finished two or three. It'll sort out itself, a lot of things happen along the creation of a long-term piece and sometimes you grow out of those stories you had back then and have to approach it another way
Edit: Btw, you can link your stories on the post so it's easier to get to them