Is it possible to make a template that I can then duplicate?

No, it is not possible to create a challenge template. Challenge templates are made centrally by the Beanstack team and are available to all libraries and schools, but templates cannot to be created at the site level. If you want to share a specific challenge with other sites, check out the steps here. And you can always duplicate a challenge for your own use within your challenges dashboard by clicking the “+” icon!