I hope my advice can give you ideas on handling your story and future ones.
First, consider what kind of story you would like and go from there.
Its fine to make stuff up as you go, I do too. Just make sure you implement that stuff into the story as smooth as you can. Don't just randomly add something with no context.
I have a very action-heavy story with lots of plot points, so I forget many of them. To help with that, I review my current chapters, envision what I want from my story, and foreshadow things early on.
I also have a 30+ page Google doc that I update all the time, holding important information and events that have happened or I plan to happen. This Google doc also has character descriptions, powers of each character, description of their personality/ character, and what I plan to do with said characters.
It's also essential to have good descriptions of what is going on(especially if it's a novel like for me). I take characters from media I like, put them in my story, and put a twist on them.
For comics, make sure to have clean and clear art so the reader knows what's happening.
Also, don't forget that you can go back to old chapters and update them to add more to your story; I do this all the time and am not ashamed to say so. That's the benefit of this website; you can always go back and add/ change your story.
Don't be afraid to use other works as inspiration. I am guilty of this and am heavily inspired by many forms of media, whether the games I play, books/manga/novels/webtoons/light novels, anime/tv shows/movies, or even daily occurrences.
Here's a list of media I am inspired by to create my novel:
Berserk(Inspiration to dark souls, bloodborne, sekiro, Elden Ring, and many more games and media)
Destiny( A franchise made by Bungie, who created Halo, one of the most successful gaming franchises of all time)
Jujustu Kasien
Bleach
Greek mythology
Spectrobes(a game franchise from the ds era)
The Bible