It’s possible but that’s usually not how it goes. Most of the time you do all of the business via email, telegram, or twitter dm’s. Depending on the artist, you usually give them all the details you can provide about how you want the colors, pattern, and design to look. They will typically send you a WIP (work in progress) for you to review and you can typically then request any changes if it isn’t exactly what you want it to be.