Hi,
Here am I. Send me.
As shown by the quotes from the Bible, Here am I is a bit archaic, a bit poetical.
It seems to me to add some stress to the I. It's still occasionally used.
eg I might say something like - Everybody's doing something interesting. Tom is on a trip to Africa, Fred is in China learning Chinese, Jim is at the Olympic Games, and here am I, just working in the local supermarket.
Best wishes, Clive