Yes, better tagging will help. With any post, check the feeds of the tags you're thinking of to see which ones have most posts. I was trying to see a good way to see what is being curated by steemtrail and couldn't find anything easy. so i set heath-trail to follow the other trails that have intro posts. so by looking at the heath-trail followed you can see some good tags. https://steemit.com/@health-trail/followed
i'm only curating health, not food, so you need to look at their intro for their guidelines for food posts.
but i think it's also important to consider what I said about writing more of an introduction, its a good first step to be noticed, but if people don't stay on your post long enough to upvote it, you're not further ahead.
give people a few useful bits of info in your preview of the podcast, and you may still get some upvotes, even if they don't listen to it