How can i change my appleid?

Do you want to change the email address of your current Apple ID account? Note the restrictions in the article.

Apple ID Name Change.  * 

 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.

Or are you trying to create a different Apple ID?

If you create/use a new Apple ID, you will lose access to some of your data and the purchases made with your existing Apple ID. 

Create a new ID (if necessary) and sign into iCloud using the same Apple ID on another Apple device/computer. You should then be able to sign in.

The maximum number of free accounts have been activated    -

Apple ID - create a new.      *

Apple ID – Create       -

Apple ID - Could Not Create or Could Not Set Up iCloud message.    *

Or contact Apple ID Support.  See the Apple Support articles below for contact information.  

Apple ID - Official Apple Support.    -

Contact Apple for help with Apple ID account security - Apple Support.  * (Link doesn’t always load)  

Get Support     -   Work through the screens to get a chat option. You may have to pick a slightly different problem.

Apple Support schedule phone call.  -

https://twitter.com/AppleSupport.  -

Manage Apple ID and iCloud settings on iPhone

https://support.apple.com/en-au/guide/iphone/iph76e54c61e/ios

Hope this helps you :)