Listen to this shit:
- Scriptnotes by John August and Craig Mazin (who really know their shit)
- Children of Tendu by Javier Grillo-Marxuach and Jose Molina (listen to the oldest episodes first)
- Screaming Into The Hollywood Abyss by Noah Evslin and Dan Rutstein
This list is intentionally short. There are hundreds of screenwriting and entertainment industry podcasts, but you should start with these three.
You should be making friends with other screenwriters, so ask them what else to listen to.