I have 3 e-mails with Apple and I only want 1

I'm not very tech inclined. When I got my 1st desktop Mac 15 years ago I set up e-mail address number one which was a work e-mail. Then some years later I tried to change it and created e-mail address number 2. I'm not sure it is still in Apples system but my windows password manager shows it to me as an option everytime I log into Apple Music. Which brings me to password number 3 which happened when I signed up for Apple Music. Can someone reply with the steps necessary to consolidate my Apple and my Apple Music accounts to be 1 e-mail address. I tried but I'm going in circles. Thanks!