yea im the same way. I have such an intricate world inside my head, usually, if it gets too convoluted or confusing ill trash it and start over but I have a few that I wrote down because it was so good to me.
JUST WATCHES ANIME REGULARLY; READS THE MANGA RELATING TO THE ANIME; GET REALLY INTO THE LORE OF THE ANIME AND IMAGINE YOUR OWN CHARACTER IN THE WORLD; USE YOUR OVERACTIVE IMAGINATION TO CREATE YOUR OWN ANIME IN YOUR HEAD WITH ITS OWN LORE