As for Lainie, helping her was more difficult as Eli was not a composer nor an arranger.
The only thing she could rely on was the information about the foundations of music, musical theory, and all other fundamental topics helpful for improving Lainie's craft.
Even in the modern world, the path toward being a composer is a long hard journey.
It entails years of practicing and learning, immersing in the beauty of music, then breaking them down to analyze and know their musical structures.
After that, one would now have to spend time creating melodies according to their chosen forms. Some took a few weeks or months, others even take years until they were satisfied with their creation.
One thing Eli did was to try and match the musical period, against the history of music in Prasinos. With that, she would try to let Lainie hear pieces that match the era in Prasinos, to give her another perspective.