To start off with the Horror begin choosing your favourite Horror Films to focus on...grab the DVDs and play them non-stop, over & over again...get some souvenires such as Horror Film Action figures and set them around your pad...
Step2
Play Horror Pop music such as KMFDM, Skinny Puppy & Slipknot and absorb their vast sounds of Industrial Music that actually create sounds of Horror with samples of Horror Films incorporated with their music or it is their "look" such as the Bloody Clown Masks of Slipknot or Insane Clown Posse or ICP....
Step3
A great film to watch that really defines a Horror Pop spokesman would be Vampire Lestat in the film- Queen of the Damned- turning Rock Star...creating Horror Pop music and then killing his groupie prey by sucking their blood....
Step4
I am still exploring Horror Pop as I assume you would to...good luck and have fun!