Thank you all for your comments.
Chris, I would agree that an actual physical classroom might be best, I just don't know if it is possible.
Peachey and Michael, I had not given any thought about CELTA, but having read about it this morning, it looks good. I'm going to delve into it further later today.
I'm a retired teacher so I'm thinking I can handle the actual classroom expectations.
For the curious, Tesol certification, consists of four classes to be completed over 14 months.
Mary, my preference is to obtain something that will allow me to teach both within and outside of the USA.
As many of you know, there is a significant teacher shortage in certain areas of America. Arizona, I've read, has a "warm body" law which basically says that so long as you are able to fog a mirror and can somehow relate your life/work experience to teaching, it is possible to obtain at least a temporary license in this state. Oklahoma does something similar. The shortage extends far beyond these two examples.
Again, thanks for your contributions.