Changing e-mail. How do I change my login

You can change your Apple ID email address on your current Apple ID so you retain access to your data and prior purchases. Note the restrictions in the article.

Apple ID Name Change.  * 

Make sure you turn off Find My Phone before signing out of the old ID. Once signed out and Find My Phone is off, then sign in with the new ID, then turn Find My Phone back on.

 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.

Go to this link log in witn your actual Apple ID and password then find the option to change Apple ID follow all steps and don’t forget to re-log in ti the AppStore iMessage FaceTime with your new Apple ID , make sure to do a iCloud backup

https://appleid.apple.com