Check with your college or unit to see if they have a template you can use or visit the University of Minnesota Campus Templates site. If you are not required by your college or unit to use a specific template you can also find and use any public templates available on Canvas Commons.
Note: If you are going to use a template, it must be applied before you start cleaning up your site.
Canvas Commons is a great resource for course templates and ideas as well as items you can actually import into your course. Here is a detailed document that explains more about How to use Canvas Commons.