"which I would assume is in my phpMyAdmin. When I open that folder,"
phpMyAdmin is not a folder. It is a MySQL GUI Tool that you open in your web browser.
your host should have a control panel that you use for manageing the domain, the control panel should allow you to access the database using phpMyAdmin.
once you access the database in phpMyAdmin, you will be able to select the tables in the database to edit the contents.