Thanks, this is the information I was looking for. Good advice regarding steps to take " boot into recovery, erase etc." The problem with the migration was mostly with ending with two users and odd behavior because both users were me with different names for "Home." and other issues. I think it is better to start with a clean slate this time. Careful, as you suggest, "on first boot, don't create any users."
When I first upgraded I had planned to boot up the new Mac Book Pro with the time machine back up from the old machine first time. But I thought I needed to update the OS in the new machine to match the updated old machine which was one update ahead of the new. I realize now that this was not necessary.
Adobe CC migrated with no problems, I had to sign in again to update a program. I have Adobe CC on my Imac 27, it is okay too. I mention this because there are problems caused by Apple ID and cloud that appear on other devices caused by the migration mistakes I may have made.
I had to change my Apple ID and with two users and a number of Apple Devices things became difficult. As I mentioned the new Mac 16 is running pretty well just some odd behavior and issues in certain places.
I hope that anyone else who reads these messages can be helped.
Thanks again for responding. It is appreciated.