Road block trying to set up iCloud mail account
I have never set up an iCloud mail account on my iMac but have decided to do so now. I was under the impression that I would have to use my appleid for my iCloud email address, but when I type in my appleid name I get a message that says that name is already in use and gives me other suggestions.
Do I need to choose a new name or not?
iMac Pro (2017)