After feedback from a new subscriber, I've decided I need to set up a simple landing page that can give visitors a clear, unambiguous idea of what Looking for Wisdom is, and a smooth path to signing up. The Ghost site is nice, but it foregrounds content rather than foregrounding a path to signing up.
So I've done a bit of work with Carrd, and set up a new landing page on a subdomain. It still feels a little wordy, so I'm going to cut it back, but it's shaping up okay.