I’d like to change the iCloud ID & email address from my current account. Also, if it is possible to create “domain” style email alias in iCloud without leasing the .com, .info websites, merely as a more professional email address. Thanks for any help.
iPad, iPadOS 14
You can change your Apple ID email to another email address that has not been used as an Apple ID. I do not recommend using an iCloud address as your Apple ID, because if you forget your password you will no longer have access to your iCloud email as well. This could be useful for resetting the password easily.
Change your Apple ID - Apple Support
Changing your Apple ID email will not change your iCloud email address, but you can create up to 3 aliases to your iCloud email address. There are additional options for naming the email if you have iCloud+. All the details are here:
Add and manage email aliases for iCloud Mail on iCloud.com - Apple Support
Change iCloud ID & email
