'Inexperienced' in the Bible

Then David said, "Solomon my son [is] a boy and inexperienced, and the house built for Yahweh [must be] exceedingly great in fame and splendor throughout every land. I will make preparations for him." So David provided abundant [materials] before he died.

Then David the king said to all the assembly, "God has chosen Solomon my son alone, a young man and inexperienced, and the work [is] great, for the citadel [is] not for humankind, but for Yahweh God.