Enola knew a ton about this subject. Her mother was one of Harry's mentors in runic casting and she was so enthused when she talked about him that Hermione felt proud on his behalf. She was determined to get into this herself, when she felt stronger. It seemed that Harry had thoroughly immersed himself in the art and Hermione wanted something to connect with him on. If this was important to him, she would make it important to her, too.