I think you’ll be fine. The nerves will be there, but you’ll figure it out. It’s not as scary as it seems. Once you start going, it’ll get a lot easier.
Dry mouth will not be a problem. If you feel it coming on though, drink some water before, let it stay in your mouth for a few moments before swallowing. Your body will naturally produce the saliva it needs once you start relaxing and feeling better about what you’re doing.
When the nerves go away, so does the dry mouth, and the nerves will go away when you realize there’s nothing to be nervous about. 🙂