Do you want us to hold your hand through this? Sorry if that sounds harsh but if you've done all that so far, you should've done it with a plan in mind -- meaning if you decided to write an eBook, you should already have some sort of idea where to sell it or how to best market it. If you don't, then you didn't plan properly.
You can use SEO to rank your website but for items such as books, until you have some reviews established, expect a low conversion rate.