Who am I. ? Figure of speech Erotesis, in expostulation (App-6) for emphasis. Occupation with self is the cause of all distrust. Note these four instances. Compare Exodus 4:1; Exodus 4:10-12; Exodus 4:13. Very different from the Moses of Exodus 2:11-14.
Related Commentaries of Exodus 3:11
Exodus 3:11
11 And Moses said unto God, Who am I, that I should go unto Pharaoh, and that I should bring forth the children of Israel out of Egypt?