There are several different recommendations on how to play this song floating around online. I like the version below as it appears to be one of the easier versions to play and it sounds like the original.
You will need a guitar capo to play this particular. If you do not already have a capo, you definitely need to get one. A capo is a guitarists best friend. You can learn more about the guitar capo by following this link.
A big thanks to Dean for making this video lesson available. You can learn more about Dean and view more of his Christian Worship Guitar Videos over at his YouTube page.
As performed by Hillsong: