Both the forms of music, namely the Indian & the Western are equally easy or hard to learn. But on comparing the notations of both the forms of music, it will be very easy to learn the basics & simple songs like rhymes, bhajans, simple cine songs through the Indian method (in particular Carnatic).
In the Western form, notation will be difficult to understand, as every minute aspect of the song is written in the 'staff' notation. The Western notation is thus a bit hard to learn and read. Moreover, in the Indian method, it is possible to sing the notes very easily, and memorise the notes for any song.
This suggestion is for those who want to learn music in a fast-track. In case you want to learn music seriously and attain proficiency, you can learn any form.