Podcast page URLs

1. I want my main podcast page, my welcome page so to speak, on my website to be at this url: https://www.publishedauthor.com/podcast.

2. I don't care so much where my podcast episode pages (where lots of episodes are listed) are at. Right now it generates something like https://www.publishedauthor.com/podcast?offset=1644303600769 and that's fine.

3. I want individual podcast episode pages to be like this: https://www.publishedauthor.com/podcast/kara-goldin-hint-water-and-undaunted

My problem is that it appears I can't do both #1 and #3. Right now I have to use the url https://www.publishedauthor.com/podcast-welcome for my welcome page, and then I can use https://www.publishedauthor.com/podcast/ for the episode pages. Or I could use https://www.publishedauthor.com/podcast-episodes/ or something like that for the episode pages and then https://www.publishedauthor.com/podcast/ for the welcome page. But I want both!

I want to be able to put everything in https://www.publishedauthor.com/podcast/ but be able to have the first page be different from the rest. 

Does anyone know how to do this?