Well, now I have the same problem, but with step 4. I try
steempy importaccount gregario
asks for password, and then a long chain of error messages like the ones a had before. But now the fix
nodes=['https://api.steemit.com']
does not seem to apply, since here we are sending linux commands, while this is a python command.

I would very much appreciate any suggestions or comments.

Thanks again for these great insights.