Complex sentence: To become a voice actor, you need to be a professional actor and attend to dubbing courses celebrities in Brazil have done voice acting, although Brazilians do not like when celebrities that are not actors perform voice acting.
Split into simpler sentences: To become a voice actor, you need to be a professional actor and attend to dubbing courses. Celebrities in Brazil have done voice acting, although Brazilians do not like when celebrities that are not actors perform voice acting.