Apple ID

Based on what I have read, I suggest you leave your Apple ID email address as a 3rd party email address because you have more flexibility if you need to change the email address. For example, if the Apple ID got compromised, you can change it to another address. I also have read of many people who were locked out of their accounts when they forgot their password. Since the recovery email address is the @iCloud email address, if you forget your password, you also can't access your email to get emails from Apple to recover your account. You can set a rescue email address, but for some people, this hasn't worked.

Hey there 林邦玥,

We understand you're looking for help with changing your Apple ID email to an iCloud email address, and we'd be happy to get you pointed in the right direction.

To get started, check out the following article under, "If you can't change your Apple ID" that can help: Change your Apple ID

If still running into any issues after these steps, reach out to Apple Support directly at this link here: Get Support

Have a great weekend!