What does 1 Chronicles 29:1 mean?

Then King David said to the whole assembly, 'My son Solomon is the one God has chosen, but he’s still young and inexperienced, and this work is huge. It’s not just a building for people—it’s for the Lord God himself.' 1 Chronicles 29:1 - Modern Text Bible

(David addresses everyone, pointing out that Solomon is young and the task is massive, because the temple is for God, not just for people.)