Read it. You're talking about improv acting and such, which isn't necessary to roleplaying. No player has to ever speak as a character. They can speak in first person, if they wish, though third person works just as well. They can take an actor stance, sure, and they can take an author stance just as well. The role playing is the decision making. The delivery doesn't change that.
If you really enjoy the thespian activities as part of your play, carry on! Share your joy in that! I'll recommend not couching it as roleplaying, though, as it's an adjunct to the roleplaying. (I can say that in the forty years I've been roleplaying, I've rarely done any first person acting.)