I am sorry it has taken me so long to answer your question anjanajnabi.
I have been her since March and just found out today I have about $12.00 awaiting me with google.adsense. I had forgotten I had even signed up for it. My feeling when I came here was that this would be a wonderful place to "speak" to others about things that interested me. Since that time, I have come here and enjoyed writing and reading others writing, without the thought of really making much money.
Perhaps another person can help you more on this issue, For me, it is not all about making money, it is about having fun.