"Waiting Here for You" by Christy Nockels was first sung publicly at a Passion conference. It's a gentle song that's a great service opener. It's a song of expectation and surrender and is also, really, a call to worship. Because it is on the slower song, it may be easier than others to play, and it will give you a lot of practice with shared chords (2 beats for each chord). Check out the free charts: