If you have not set a password, the option to change your email address will not be given. So here's how you can set a password and update your email address.
From this page (https://yourportal.campusesp.com/my/profile), you can click on "Change My Password":
Next, you will create a password on this page and click on "Complete Registration":
The system will ask you to fill out a survey so you can receive personalized newsletters.
Once you have gone through all the steps, you can click on the person icon at the top right of your portal, then select "Edit My Profile":
Now you will be able to update your email address. When you have changed it, click on "Save Changes":