Try the "writing excuses" podcast. Is not screenwriting, but many many of the same elements apply. Also, screenwriting is ultimately meant for the screen, so th

Try the "writing excuses" podcast. Is not screenwriting, but many many of the same elements apply. Also, screenwriting is ultimately meant for the screen, so that intently means a collaboration with someone visual. Talk to people who will be honest with you, but only once you've finished at least a scene. Your idea, the thing you want to write, can get lost if you listen to too many people before getting it down and out at least once.