Hey i became a fan of this song the moment i heard it. What a lyrics by Swanand Kirkire, simply superb piece of poetry. And simplicity in music by Ram Sampat as well.
I made a guitar cover of the song. Check it out. It's in G-Csus2-D and C-Em-Am-D progression. Not that difficult.Do check it out.

O Ri Chiraiya - by Abhijeet (Guitar Cover)- Unplugged (Satyamev Jayate) - YouTube

Peace out. And stop female foeticide.