Installation

I really like the sound of this module having tried many others however I am really struggling with the installation and getting it to work as expected. I have added the extra code in my composer.json which has installed the npm-asset folder and its contents. Created a date range form display field and set the widget to Duet date range picker. When then going to the node form to add a date, it would seem that the date duet libraries nor the css are not loaded as it just doesn't look right and nothing happens when clicking on the input fields.

I know it must be simple and sorry, but I just can't seem to get it to work, like others seem to have done.
I'm using Drupal ver 11 and the date range field. See attached screen shot. Many thanks.