I am a lawyer, model (Camel Man etc.), author (a dozen books), documentary film maker ( a dozen films), actor (been in over fifty movies and television shows, two dozen commercials), acting teacher (30 years), rugby player (6 knee operations, broken neck, nose + back) and artist.
Teaching people to come out of their shell and be courageous, great actors.
This is done by many repetitions. An actor works 8-15 scenes each class.