I need a book cover graphic designer.

I’m an author from Massachusetts, who has written and self published four books within the past three years. The books covers designed I used for the four we’re from the generated images that are provided through Amazon. I’m not entirely satisfied with them, but the ones I picked out were what I considered to be close in relation to the general setting and feeling of the books that I wanted to project within the pages. Three of them “Lost Case Encounters” “Corrections Mayhem” and “Among Altin” are sci-fi/horror pieces. The last one is “Tales Of Alandria Bridging Of Worlds” the first installment to a sci-fi/fantasy/adventure series that I have been planning out since 2014. I do have general ideas to what I wish the covers to look like, but no considerable technical skills with putting them together on my phone and computer. I’m seriously looking into changing my book cover design to make them more appealing and because they have been out for a year.