Having been on both sides, just walk in "not wanting it". Let all the anxiety, fear and stress leave your body because you already have a job. Focus on having a good time, a good conversation and let your personality show. Give them 500% energy and forget about your stutter. You know you are #Awesome so give them all your KSAs ( knowledge, skills and abilities) and before you leave, they'll offer it to you. #YouGotThis You don't need luck because you are already #AWESOME