How to write a successful horror novel?

A story about a guy who gets 3 wishes and reincarnates in Legend of Korra as an earthbender prodigy. I always wanted to write fanfiction and the idea for this story kept popping up in my head so here we are. My main goal right now is to upload a chapter at least once a week and that becomes a lot harder when English isn't my first language. Besides that please be gentle with me as actually posting this took a lot of courage for me. I own nothing besides the OC.

Synopsis.

WARNING my stories generally lack spirit i write for fun and to free my head from this particular plot. Expect inconsistency bullshit power ups and messed up logic and also don't expect good grammar.

What happens when a certain young man got a system? What if the system is brokenly overpowered? What if there are many waifus in the area? Read now to find out

When a woman dies in the ocean with regret and hate, she becomes a siren to mesmerize men to sink their ships. When a woman dies in the snow in despair, she becomes a yuki-onna to freeze anyone who has the guts to look at her. When a raped woman dies with the desire for revenge in her heart, she becomes a succubus to suffer men and to be fed from them. This is my story; written for those who take the hard way instead of accepting death and rely on angels to bring justice. *Mature content *No underage character *No incest *No love, just lust

[Currently under heavy editing] Death. What is death actually? Athan, a twenty-one year old genius, died in an accident. He got hit by a truck and was thrown few meters on the ground. "I couldn't even finish reading the novel..." He regrettably thought, holding onto his phone tightly not wanting to let go. In the screen, there were letters written in a sentence waiting to be read. However, he couldn't. In his last moment, he could only think of one thing. It was his wish to finish the remaining three chapters of the novel. "I guess I'll never find out the ending..." He closed his eyes and let his mind get drowned in darkness. [ Timer left : 00Y : 00H : 00M : 03S ] [ Timer left : 00Y : 00H : 00M : 02S ] [ Timer left : 00Y : 00H : 00M : 01S ] [ Timer left : 00Y : 00H : 00M : 00S ] As the loud ticking sound rang in his ear, his mind finally gave out as he fell unconscious. He was dead. He was sure of it, but... "Eh...?" The moment he opened his eyes, he found himself in someone else's body. He stared at his hands in surprise and noticed that he was in a body of a newborn child that came out just a few moments ago. And worse, "So... Am I gonna die again?" He was reincarnated as a villain. ~~~ Hello guys, Author here, I just wanted to say that this is the first novel I've ever write, also my language is not full english. So, expect that some of my grammar are bad. Feel free to criticized me if my writing is bad, so I can change and learn more about writing. I will be re-editing the first volume in the future.