You will need to create a design (or at least apply one) http://manuals.matrix.squizsuite.net/designs this tells squiz, where to pick up the css and js files from. You then apply the design to your page which at the moment only displays the bodycopy.
This page is to be pulled into a current site in squiz using an iframe.
Iframes can cause difficulties with accessibility & usability. You might consider using other Squiz Matrix asset types like Remote Content or REST assets to bring in information from a url and display it as though it was content belonging to a page within Matrix. Those asset types are more 'advanced' than many so it might make more sense after you have had your training and a bit more of a read through the manuals.