Hi,
Password typing is hidden when logging-in into CLI. So it's normal that you can't see anything when they prompt you for password. Just enter the password and press enter. Sometimes copy and pasting the password isn't the best idea as it sometimes parses the password wrong, so try entering it manually, not copy-pasting it.
And security for failed attempts is also normal, you can always increase the attempt number if it's annoying you.
EB.