My aspirational Social Podcast Webapp

As a way to expand my Racket skills, I started writing a webapp that I thought needed writing—

The core functionality would be that of a podcatcher—allow users to subscribe to, listen to, rate, and review podcasts—but with social aspects—profiles, sharing, liking, commenting—including federation using ActivityPub.

Thus far, it's able to process an opml file, and retrieve, process, and store rss feeds.

I'm a definite amateur, and would be happy to get any feedback!