All you have to do is dream up a good URL at your domain and redirect it to the feed’s URL provided by whatever service you use to host your stuff. And then that’s where you tell folks to subscribe.
It’s easy to forget (like I do) that there’s nothing magical about an RSS feed. It’s just one more thing served by HTTP at a URL. And thus, is useable with the real magic here which is HTTP redirects.
This is a brilliant idea. The only thing I’ll add is just to make those RSS feeds discoverable.