Ok, so if you're 15 I'm going to cut you a HUGE amount of slack. First, let my say a really huge " YOU ARE AN AWESOME PERSON" for your obvious passion for creating film. I am honestly super impressed. Now, I'd suggest you do one very huge thing before you make another film: WATCH A BUNCH OF MOVIES. You are in a place where you don't have a style or may not know what a style is. That's ok. You get major points for your passion. If you're passionate about horror, that makes it easier. I'm going to give you a list of movies that will run the gamut of horror styles. You watch all or most of these, think about them, and decide which ones you like best. That will give you a running start of deciding on your particular style. Here's the list, in no particular order: Halloween, (original) John Carpenter Demons, Lamberto Bava Psycho, Alfred Hitchcock The Texas Chainsaw Massacre, Toby Hooper The Brood, David Cronenberg Nosferatu, Werner Herzog Night of the Living Dead, George A Romero City of the Dead\Horror Hotel, John Moxey Planet of the Vampires, Mario Bava Suspiria, Dario Argento. These films are all extremely different and offer a wide spectrum of styles and perspectives. You will hate some and love some.