My favorite comic and writing podcasts are...
Graphic Novel TK
Comic and publishing industry professionals talk about exactly the process they go through to create and publish and market their graphic novels, to make the process as accessible and transparent as possible. They put a lot of focus on answering common questions and defining industry terminology to make it easy for new people to break into the industry.
Professional writers, led by Brandon Sanderson, talk about how to be better writers, going into specific character and plot challenges and how to resolve them. They often have guest speakers, including N.K. Jemison, L.E. Modesitt, and even Mercedes Lackey. While the podcast has a heavy lean into sci-fi and fantasy, their writing advice is applicable for every genre and style of writing.