After updating my networking settings, OctoPrint came right up. Updates all failed, so I re-imaged the SD card with OctoPi and restored... updated everything, and under an hour later, I'm back in business!
There's no point to this post other than to say, the resources on this forum are phenomenal. I found a similar thread that got me pointed in the right direction.
I think I'll need to get some new filament, though...