Jaye Em Edgecliff
Write your story. Screw all the writing advice out there. You like adverbs? use them lavishly. Do you like to split infinitives? You're weird, there's actually no such creature in English (seriously). Do you want to end a sentence with a preposition? Go right on ahead with your rebel self (besides, it's not actually any violation of English grammar … no, really, it's not).
Write the story you want to write. Don't ask yourself it it will sell. Remember, J K Rowling was writing in an, ahem, "dead genre". You never know until you write it.
DO get a good editor. A good editor as defined by someone who will help you find your genuine grammar, spelling, and orthographical mistakes. One who will look at the story as a whole and tell you where parts aren't clear, are contradictory, etc. and offer you a hand in correcting them SHOULD YOU NEED IT.
Aside from that it doesn't matter. It simply doesn't matter. If an agent or publisher won't take it, self-publish.