Hey.. I want to provide escrow service to everyone and will definately be trustworthy. How can i provide the service? What are the requirements?? Please help 
Very brave idea! I suggest you first build trust. Before anyone will give you money, first have to trust you.
Bitcointalk have trust system - details about you everyone can check here: https://bitcointalk.org/index.php?action=trust;u=878515
At the moment, unfortunately, you do not have even one positive comment.
With confidence on this forum, is just as in real life. You will have to work a lot on it to earn it.
Here you can find a list of the people that built trust - check their history, and you will find your answer:
https://bitcointalk.org/index.php?topic=855778.0
Positive feedback. You get sometimes them by trading successfully or be trustworthy enough. If you go to your trust page you'll see 2 Neutral comment warning people about how you want to be an escrow.