Moses first says, "Here I am" then once he finds out its God speaking to him through the Burning Bush he says, "Who am I?" But...for what reason?

Perhaps it's feelings of worthiness...but perhaps he wonders if it's his fight to fight. If it doesn't directly affect us, do we feel like we have to get involved? This is an important question in our day and time as the church wonders about getting involved or not meddling in other people's affairs. So church...what's it going to be?