Apple ID change
Can I change my ID and still keep purchases from the old ID?
Can I change my ID and still keep purchases from the old ID?
You cannot get a new Apple ID and transfer purchases from your old ID.
You can edit the information for your existing Apple ID without creating a new one. Change your Apple ID - Apple Support
Apple ID email address or password - What to do after you change I suggest doing this before you change your Apple ID or password.
Apple ID change