Is Carnatic music difficult to learn?

Depends upon the tutor profile,location,mode and duration of the class. Somewhere starting from 2000 per month for 8 classes.

its relevance today is a subject of debate, with some arguing that it's the core of the art form, while others see it as a source of inspiration or a tradition that can be practiced without strict devotion.

Raga alapana, Tanam, Neraval, Kalpana swara and Ragam Tanam Pallavi

Musical forms are the improvisations to prove the musicianship.Geethams, varnams,kritis keerthanams are various Carnatic musical forms

There are 72 melakartha ragas or parent ragas.Janya ragas are the Ragas which are derived from them. But with the combination of various swaras there can be no limit for RAGAS, and as of now expert musicians...