I absolutely would help with voice acting, but you have to be strategic in which class you take. A general acting class will benefit you with clarification of intent and objective. However, taking a Voice and Speech class will help you understand how to most healthily produce sound and help you learn to manipulate your instrument without causing harm. However, the best advice that I can give you is to do your research. Find out who teaches the classes that you are interested in, reach out to them with how you hope the class will move you toward your goals, and they will tell you if it's the correct fit. If it's not, they will also probably know if there is something reputable in the area that will help you.