The term for “young” here is the same as in Judges 16:26. As such, it is hard to give a firm identification of his age. At the very least, he is an inexperienced Levite, likely not twenty-five or thirty years of age, You when one became a priest (Numbers 4:3, Numbers 4:30; Numbers 8:24–26).
7 Now there was a young man of Bethlehem in Judah, of the family of Judah, who was a Levite, and he sojourned there.