Creating a feed for a subcategory for feedburner (podcast)

I run a podcast through Feedburner (https://feeds.feedburner.com/destroythebrain). However, my non-podcast episodes are showing up in the feed and I don’t want them to. I have seperated them in different categories and everytime I try to add a webaddress dedicated to that category, it will not work.

I have all my podcast episodes under the category “podcasts”. My WordPress is installed at “https://www.destroythebrainonline.com/podcast”.

I have tried:
https://www.destroythebrainonline.com/podcast/category/podcasts/?feed=rss2
&
https://www.destroythebrainonline.com/podcast/category/podcasts/feed

I don’t have permalinks on (nor do I know how to add them).

Please Help!

Also, does anyone know how to have my main domain(destroythebrainonline.com) automatically go to the WordPress blog?

Thanks!