Thanks for writing in! You can use The Grid plugin to display your Category feeds using it's shortcode.
You can check The Grid documentation from the following link (https://theme.co/apex/forum/t/extension-the-grid/74). Also there's another plugin called Essential Grid which you can read more information from here (https://theme.co/apex/forum/t/extension-essential-grid/68).
Let me walk-through some of the important steps on The Grid plugin, to get the category feed. Once you create a new grid according to instructions on our knowledge base section, under the Source tab, you can select source type as post type.
Then select posts for the Post Types
Then you can select your category podcasts for category filter.
These basic settings will get you all the posts assigned to your Podcast category. Then you can set other settings according to our knowledge base article and place The Grid shortcode into your page. You can use the Classic Raw Content element in Cornerstone to add your shortcode.
Hope that helps.