This site gave me a good starting point. I ran the commands in my WLS Debian instance and then uploaded the keys via cPanel copy & paste, per this site starting at Step 9.
I am a little concerned about this, as matthannan.net is, basically, what everything runs off of, not www.matthannan.net. There must be a way to fix this.
But, this is progress.
EDIT/UPDATE: I solved it! Well, this guy solved it, but it seems to be working.