Would you be willing to answer a few brief questions about PlayStation Forums?
for psn because the one i put int very secure and i dont use it much
On your playstation go to Playstation Network>Account Management then change it through there.
Yup. Your email is your sign-in ID. It can be changed here:
Or directly from your console.
As others have already answered the question, I can only add...
Welcome to the PlayStation Community Forum.