How can you differentiate book cover artists and normal artist?

I am Jack, and I come from Paris. A traveler, blogger, and entrepreneur. I want to write a book in which I tell the world about my experiences traveling and blogging. I struggle to communicate effectively in English. According to what I've heard, you can hire fantasy book cover artists who write books for other people and create unique designs. Nevertheless, I truly do not know anyone who can convey my emotions and significant experiences in the manner I require. Is there anyone who has firsthand experience by hiring book cover artists?