Where can I find templates?

With a spread open, click on the Library icon to select a template.

From the Library icon, The Templates tab shows all the templates that are available for you. There are multiple categories of templates, including your own designs, Coverage, simplyCreate and Theme templates.
Under the simplyCreate option you can either select All simplyCreate to see all the templates, or select a particular category. Once you select a template, you can either Add to Page or Add to myContent.