Carnatic music is basically classified as: Beginners level - sarali, janta, daatu, hecchu sthayi, mandra sthayi, alankarams and pillari geetams.
Intermediate level : Ghana raaga geetams, Swarajathis ,taans varnams and simpler kritis
Advanced level: ATA taala varnams, complex Kritis, keertanas and Manodharma Sangeetam.
https://drive.google.com/file/d/1KAfqvcRURH7fZz-SrnNpTyrA4jQU80lC/view?usp=drivesdk