Hi @jmurph18
I'm not sure if your school uses a different nomenclature, but "Blueprint" courses are generally set up as "templates" to design course content that will later be automatically copied over to the "real" courses, where the students are actually enrolled. (See https://community.canvaslms.com/t5/Instructor-Guide/How-do-I-sync-course-content-in-a-blueprint-cour... for a little information about the Canvas "blueprint course" functionality).
For that reason, students are not normally enrolled in "Blueprint" courses, and in some schools, permissions are set up so that instructors cannot add students. However, you will probably want to contact the Help Desk at your school with questions about specific settings and permissions on your school's Canvas.