In general, it is important for actors to have a strong foundation in the basics of acting, including voice and movement training, scene study, and auditioning techniques. They should also develop their skills in improvisation, characterization, and stage presence. Actors should also be prepared to work hard and face rejection, as the entertainment industry is highly competitive.
With dedication and perseverance, it is possible for actors to achieve success in the industry, regardless of their background or qualifications. Some famous actors who did not attend formal acting school include Johnny Depp, Brad Pitt, and Jennifer Lawrence.