Thank you, i have a question about how the walkthrough is structured, at first i thought i should do every character in the order its listed (mira then church then monastery then tia, etc.) but i realized that there are other stuff i have to progress in order to progress mira's questline, right now i am struggling to get enough copper ingots to build her over, i can only find 3 ore veins, and been trying to get rusted swords to drop, but to no avail, any tips ?
Without you knowing the story, and me not wanting to spoil it for you, I can't specify how I would break from going down the walkthrough in order, but that is not a strategy you need to follow at all. You totally can, but you do not have to.
It makes the most sense to be structured the way it is because time with a LI is pretty much the reward / reason for completing all quests, the order is roughly the order that the LI's were introduced in the game.
So the earlier character's later content was only programmed long after 75% of all the LI's first quests were added.
I would recommend going in any order that interests you, knowing that like any game there are traps designed for you to fall into, but none are unsurmountable to get out of. Nor do any of them cut you off from getting an LI's full content. Most of the traps are actually just "I want and am working on this" but now "I have to pay attention to this for a bit". With the tension coming from what you want to do, verses what you have to do.
--
Since you don't have the oven yet, you won't finish "the key to her heart" before she disappears for a bit, which is fine, it will pick up right at the same spot when she comes back.
It sounds like you are doing everything you can to get copper, I have had pretty good luck getting rusty swords to drop from the Orc that attacks when you watch Tia chop wood. But I wouldn't worry about copper that much right now, because like I said you are going to have a brief period where having the oven doesn't do anything.