What most naturally follows?

How to photograph a baptism
Choose a tone.
What are you hoping to get out of your baptism photography--a memento of the event, or a demonstration of your family's experience? The tone you want will determine how and when you take your photos.
Tone can include whether your photos are serious or relaxed, playful or solemn.
The personality of the people being photographed will also come into play. Given that a baptism is a serious religious experience, you will likely need to have at least some serious photos.