I recommend interviewing 3-4 architects.
Maybe someone your friends can recommend, or checking association websites like the Association of Licensed Architects, or the AIA. Check out websites and see if anyone looks interesting. Ask for an initial meeting in order to discuss your vision of your project and to see if the architect is interested and has a passion for your project.
Confirm that they are licensed Architects in your state. Ask about the sequence of how the design process, the bidding process, and construction phase would work. Ask what specific architectural services are provided. Of course ask about compensation (% of construction cost, hourly, or fixed fee).
If the chemistry is there have the architect put together an Agreement Between Owner and Architect, and let the adventure begin.
Good Luck, Be happy!