Thanks for all the help. Sorry it was such a slog, but it's working now. I listened via WAN for several hours and have it going now.
I'll give it another test when I travel for the upcoming Thanksgiving Holiday, and will upgrade to MC 33 when I get back.
PRO TIP for anyone trying to use this method to test (i.e. wifi hotspot on their phone) - Purchase a temporary upgrade to unlimited data - my cel plan only includes 5G per month which is almost always enough, but I left the hotspot active overnight and something gobbled up all the remaining data - probably a Windows update for the laptop - but having unlimited data is one less thing to worry about when trying to get this to work.