I usually come up with an idea. And I'm very visual so I'll even find pictures or draw something.
Find an artist with a style you like them call em up. Ball their shop or whatever and ask for a consultation.
Tell em your idea. Does em pictures. Maybe show them some of their stuff that you like.
Then they'll advise you like "oh maybe it shouldn't be in this spot but in that spot." Or "maybe smaller" "maybe bigger" "what if this instead of that" and you work with each other until it sounds like you're on the same page🤷🏽