I Traveled to Another World and Started My Career in Blasting

(This book is also called The Key to the Moonstone) An adventure story in which the protagonist tries various skills in a different world and finally returns to his true nature as a blaster. Apothecary, mage, forger? Magic weaver, energy creature, key to the world? Elf Forest Blacklist, Friends of the Dragon Clan, organizer of the Sunset Red Tour Group in Another World? Please, I just want to be a happy big bomb. (PS: The entire text except the first chapter is in the third person.)