iCloud email

Hello gaye65,

1. Go to Settings > [your name] > Name, Phone Numbers, Email. 
2. Next to Reachable At, tap Edit, then delete your current Apple ID.
3. Tap Continue. Enter the Apple ID that you want to use.
4. Tap Next.

Use your Apple ID account page (recommend)

1. Go to appleid.apple.com and sign in. 
2. In the Account section, click Edit. 
3. Under your Apple ID, click Change Apple ID. If you try to change your Apple ID to an @icloud.com email address created within the last 30 days, you might be asked to try again later.
4. Enter the Apple ID that you want to use.
5. Click Continue. 

If you enter a new Apple ID that ends with @icloud.com, @me.com, or @mac.com, you see a message to confirm. When you change your Apple ID to an @icloud.com, @me.com, or @mac.com account, you can't change it back to a third-party email account. Your former Apple ID that ends with a third-party email becomes an additional email address for your Apple ID account.

Verify your new email

If you change your Apple ID to another third-party email address, you need to verify your account.

After you enter the email address that you want to use as your Apple ID, a verification code is sent to you at that address. Enter the verification code from the email into the fields provided and start using your updated Apple ID. Didn't get the email?

Sign back in

Sign back in to all Apple services with your new Apple ID.

After you change your Apple ID, you need to use your new sign-in information with all Apple services that you use.

Cheers!

source: https://support.apple.com/en-il/HT202667