However i am not confident in correcting others essays..... may be in due course of time i will be able to do it.
Thanks, Jojo, I understand! But wouldn't you like to hear what someone thinks after they read your essay? I bet you would not mind hearing from someone who says, "I am not confident yet, but I will tell you the idea I got from your essay."
So, it is not all about making corrections. You can visit a person's essay thread and just tell them about the ideas you got from the essay. Mostly, it is about giving each other encouragement.