Thank you for this input, @ecoinstant. Looking through it again, I can see you are almost certainly right. And, yes, you did tell me that in the first place - create a new account!
My time constraints make that a very unattractive option. I could say more, but I won't belabor the point.
As stated above, I do now have a wallet with 10,000 Sats in it, set up for the express purpose of joining this community. FWIW, I have considerably more than that to put in there, if there is ever a future option of joining it with my existing account.
For now, maybe I will write a post about my experience in attempting to set this up. In it, I can show why I went the direction I did. If nothing else, perhaps it will provide the devs behind this community with some useful input for their consideration, in making improvements.
RE: What an Adventure!