Actually to use escrow is easy. Just know who will stand for it, it must be trusted here in the forum. Anyway escrow service is the one who stand as middle man, it really has to be trusted, there is a list here in this forum whom you can trust on. Just be wise on choosing some gives it free and some ask for high fee. If your transaction is just in small amount maybe you can do it without escrow but if the amount is a hundred bucks and you are newbie for sure they will ask for escrow, that is the time you gonna use escrow service.