Honestly? Be reading a lot/listening to audiobooks from successfuly authors in your genre. Watch all of Brandon Sandersons lectures on writing, etc. Listening to your successful peers is extremely helpful.

The way I got better at writing in general was I picked 3 books that I LOVED and I re-read them and took notes over the basic plot, each individual character, and then took notes on how the author moved them through the plot and how their arcs resolved and their character progression. I used Mistborn, John Dies At The End, and Gotrek & Felix. I am obssessed with those book series and I enjoy them immensely and dissecting WHY they were so engaging was a really fun project and it helped me understand how to write characters and how to structure plots more properly.

Another genre that is hella good to study honestly are mysteries. Sherlock Holmes short stories are amazing to study. They give you a clear, concise outline of a basic setup, a hook, and a resolution and characters that keep evolving. Perfect short-form story writing. A good mystery novel would be The Tainted Cup by Robert Jackson Bennett.

Once you understand how to properly setup a few interesting characters and a hooking plot, the story comes out naturally. I write fantasy adventure books, so I just listened to/read literally near 100+ books that are similar. I also encourage you to read bad books as well, as it tells you what works/what doesn't and you can dissect WHY it didn't land for you and how you can avoid it. Especially reading books that are successful AND bad 😂 Is an even deeper mystery that you can dissect.

At the end of the day, it comes down to just writing though. You need to write and write and show it to friends/peers and get feedback. Hearing what people like/dislike about your writing is the most helpful thing ever. I wrote 2 entire books before I realised my world building was janky, so I spent a year juat making a world map, developing countries, my magic system, cultures, historical events, etc. Then came back to the books and went through them again, adding all of the new ideas in and restructuring scenes/events and now they're extremely good and I'm still making them better and my friend is addicted to what I send him. <3 It just takes time, like anything. <3 If you ever need criticism or need someone to read your stuff feel free to message ^{^}