Hello @HeidiFoster ...
As @SusanNiemeyer has stated above, you will want to be logged in to the course where the content will go into. Think of it like this...you have a "source" course (where the content currently lives) and a "destination" course (where the content will be going to)...at least, that's how I like to think of it. Log into your "destination" course...as you'll be selecting content to import (copy) from your "source" course into the "destination" course.
Next, you'll want to review the instructions in How do I select specific content as part of a course import?. Once you select the option to select specific content, you'll be prompted with options to import (copy) just the pieces (your rubrics in this case) that you want.
I hope this helps to clarify things for you. Sing out if you have additional questions.