You cannot play this song like a Western etude. Here is how to nail the style:
In the line "Dekho mera nasha..." , the notes slide into each other. Do not lift your fingers. Shift smoothly from C to C# and back to C to create that "wailing" Sufi effect. Maula Mere Maula Violin Sheet Music
It is one of those rare pieces where a western instrument perfectly channels an eastern prayer. You cannot play this song like a Western etude