No one ever told me writing a synopsis would be so hard!

Writing my novel was the easy part! Telling people why they might want to read it....not so much. What do you say or write in a few lines about a story that is as complex as the writer who penned it? I can't even narrow down a genre which is probabaly the biggest roadblock to solving my issue. Sometimes I want to call my novel a mystery since Amelia is a detective solving a case, other times I want to call it urban fantasy or a parormal/contemporary fiction, and sometimes I want to call it a romance. Then there's the marketing thing. Do I bother to mention that the main character and author are African American? Does that even matter? Do I focus on the fact that Amelia's adoptive parents are gay? I never know what to do and am convincd that a clear focus is what harms me. I feel that if I promote that Amelia's a werewolf, black, or has gay parents, I miss out on letting the reader find out for themself and it kind of cheapens me as an individual because what I wrote was not to help highlight these facts, but to show how unimportant they can be to the overall storyn