during summer Harry and Sirius should really go to the "world below" and make Harry learn some "dragon language".
Sorry for criticism, but when Harry is in the Manor, since he has nearly no guidance to how to administer his family properties, make him ask advice to his ancestors. Or regarding school since he has an Headmistress portrait. Or war to Lucius, Auror ancestor and Dark lord one; since even the dark one should wish for his family to survive. Just a way to make him seem a lot more human and not "perfect whatever he does".