The Strongest Dragon in the Era of Beast Taming

The Earth Dragon God who created the land, the Yggdrasil that nurtures life, the Lightning Wind Leopard that darts through thunderbolts, the ever-changing Ragdoll, the apex of technology in mechanical battle armor, and the unparalleled Creator Divine Beast.
This is a world with a brilliant Beast Master civilization.
How can a young man who has crossed over to the Blue Star become a steadfast Dragoo in this glorious Beast Master World?