You will surely have the design that will get the attention of the customers you want.
While designing a book cover its important to " Think like a reader, not like a writer". Cover images and text must be clearly understood as thumbnails, which is how more books are being sold today.
No need to anxious about the design just leave it on my creativity, kindly please describe the audience you’re aiming at, the style of the book (adventure, romance, thriller, etc.), the period it’s set in, the mood, as well as important characters or moments.
Eagerly waiting for your response,
Best WIshes
Daniel