New Apple ID
How do i start a new Apple ID? I have a new email address i want to start using for my Apple ID?
If you create/use a new Apple ID, you will lose access to some of your data and the purchases made with your existing Apple ID.
Apple ID - Could Not Create or Could Not Set Up iCloud message.
Have you considered changing the email address on your current Apple ID? Note the restrictions in the article.
What to do after you change your Apple ID or password - Apple Support I suggest doing this before you change your Apple ID or password.