To change your Apple ID to a new email address, go to appleid.apple.com and sign in with your current Apple ID. Then open the “Sign-In and Security” section and click on “Apple ID.” Type in the new email address you want to use, and Apple will send a verification code to that email. Check your inbox, copy the code, and enter it on the website to confirm. Once it’s verified, your Apple ID will be updated. After that, just make sure to sign in again on all your Apple devices and apps like iCloud, App Store, and Messages using your new email.