I think Raon inherit the knowledge of his ancestors. And the rest is instinct.
Instincts yes but knowledge of his ancestors nope. because young dragons will either learn it themselves through experience or they will have a "teacher" normally that's a parents role.
& that "teacher" will pass all their knowledge to their students before they die.
It's because I heard some dragon stories that Dragons have some degree of inherited knowledge (genetically stored memory). Either way Raon is a very strong Dragon for his age. And of course even stronger when growing up ٩(๑❛ᴗ❛๑)۶
Raon being only 4 years old & trapped since birth in a cave, showing us how he excelled at everything he does, even though he had limited knowledge about magics
& without guidance of senior dragons to teach him the "basics" & how to be a "dragon"
but still became cale's allrounder from being a personal doctor, defense & offense carrier, Tracker, refrigerator, Treasure detector, magic/dead mana detector, sound proofer, lie detector,
trap dectector, translator, moral advisor, Infinite magic bag, communication tower (relying informations ( incl. cale's bs) to cale's group incl. alberu.
he really deserves to be next in line...