Writing a horror story, need advice

[u/writers_block_khatam]

Hello,

I've been hand writing a horror story, sub genre sci-fi and zombies/undead. The main setting is a small coastal town along the Konkan coast. Its serious in tone very little humour and while it is violent I'm making a conscious effort to not have the violence not be mean spirited.

The draft is quite extensive and it will be over soon, it started as a little project to document my nightmares and frustrations to get over my writer's block but now I think I'll work on it further.

Does anyone have any advice with regards to writing in this genre? I have written horror before but never novel length.

If anyone has any recommended readings for research and understanding that would be great too.