If you're not willing to risk it I'd skip it in that case. Look at some of the more unusual gobies, assessors, etc. If you're not wanting to stock shrimp you a few more options.
meaning keep shrimp in the tank. Some fish aren't considered reef safe because of their appetite for shrimp where they'll leave corals alone. And gobies can be some of the easiest fish to keep and are a great beginner choice. They also come in a vast array of colors and patterns and getting one wouldn't mean it looking like your clowns.