Story feels a bit odd to me but the happy optimism keeping me reading so far. The goddess giving her a -50% cost to healing spells cost seems kinda excessive though, lol
My guess for all this stuff is this is the mmo world as it would be like without players (besides her). Basically the spin-off dating game didn’t have players, you played as the heroine. But her knowledge of reas is the one with players. So elemental weapons were made by player blacksmiths probably.