I did it!!!
5 minutes of walking then 20 minutes of jogging. Without stopping. (Except to tie a shoe. Because I figured it's better to stop to tie a shoe than to let the shoelace stop me forcefully.)
20 minutes! I didn't know how big of a deal that would be before I started this program. For me, someone who's always been a non-runner, that's a long time. I was breathing pretty darn hard by the end.
But I did it!