"I'm a struggling artist, frustrated writer, ...
This means bigger and louder. "Project your voice" means make your voice louder and "project more" may mean to do a bigger movement and acting.
An apron is a part of the stage that actors are not supposed to stay. This is the nearest part of the audience and is usually semi round in shape. Actors are not allowed here because no light falls on this part of the stage.
Curtain may mean "action" for films and "begin" for exercise instructors. This is the term that signals an actor to start acting.
This is the person in-charge of the theater, audience, ushers and ticketing. He makes sure that there will be no cell phones beeping, unruly audience and unclean venue.
This is maybe the longest and most stressful rehearsal. This is when all things come together. Lights, sounds, costume, etc. This is equivalent to a real show already.
This happens in the early part of the production schedule when actors read the script. People in different roles usually gather in small circle where they read scripts. The purpose of reading is for story familiarization.
An audition is called for future actors to try on roles. This is the chance for players to show-off their talent in acting, singing, dancing and other skills that are needed in the play.
The time that is expected for actors to be at the set or rehearsal venue. Call time may be at 8:00 AM but rehearsals may begin after an hour or two due to set-up, workshops and other preparations.