Self-hosting my own federated podcast called Linux Prepper

I’ve setup my own federated podcast through Castopod, but unsure of how to federate it with Lemmy directly. It is project-focused around FOSS tooling and just enjoying life. X-posted to selfhosted and technology communities.

Any suggestions on better integrating it with Lemmy, Mastodon and other services? Relay servers were mentioned to me, but I haven't messed with them yet. This article on joinfediverse wiki, https://relaylist.com/ and Fedi Tips guide are what I'm working through understanding. Thanks!