Need help with Kindle keyword research

Pretty lost. I've already written one fictional ebook that I wrote on a genre that is sort of untapped but as far as keywords go or even topics to write about, I don't really understand the process... like how do you find the topics to write about and how do you incorporate that into the title/description? Like let's say I wrote a book on pirate romance, but the book isn't called "pirate romance" it's called something else. Would the title be like: "Passion Waves Book 1 (the passion waves book 1 series pirate romance)'.

Is that how I add the keyword to rank?

Unless you already have a following/a lot of marketing spend the hardest part of making money from a book is launching. Unless you know how to do that properly you will struggle. There are many threads on here that explain various ways you can go about it.

Or if you prefer I offer a JV that can help if you want to take a look at it:
http://www.blackhatworld.com/blackhat-seo/joint-ventures/752506-amazon-kindle-publishing-jv.html