Thanks Sarah!
An alternative resource might be my article on Moz about optimizing WordPress for SEO
https://moz.com/blog/setup-wordpress-for-seo-success
There are also some prior Q&A threads that address duplicate content in WordPress:
- https://moz.com/community/q/wordpress-category-archives-index-but-will-this-cause-duplication
- https://moz.com/community/q/utilising-wordpress-attachment-pages-without-getting-duplicate-content-wwarnings
- https://moz.com/community/q/moz-analytics-telling-me-i-have-duplicate-content-issues-how-to-fix-this
Hope these help!