Change I’d email don’t have email password

Have you forgotten your Apple ID password? -> See this Apple article: If you forgot your Apple ID password

If you forgot your Apple ID password - Apple Support

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

B T W:

You are sign in here .  .  .  with your Apple ID & Password.

Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.

You can’t merge multiple Apple ID accounts.

What happens when you use the same Apple ID & Password that you use to sign in here?

See the following Apple articles

Sign in with your Apple ID -> Sign in with your Apple ID - Apple Support

Manage and use your Apple ID -> Manage and use your Apple ID – Apple Support (UK)

If it is the email password you forgot that prevents you from receiving emails, then log into the email providers web page and choose the forgot password option. You will then have to add the newly created password to your Mail settings to start receiving emails again.

If the email is an iCloud.com email address, then the password is the same as your Apple ID and you will need to reset your Apple ID password as stated earlier.