aem 6.1 DAM Alert popup/alert

Hi guys, so I am currently working on AEM 6.1 and I have been assigned a task to display a popup/alert message immediately when I land on the DAM. This alert should just contain a message with a few guidelines.

I would like to know how I would access that DOM from my project. I tried using a clientlib category  "cq.authoring.dialog", but i take it this particular category only works when authoring, so I would like to perform the action immediately when author clicks on Assets