Where should I store the seeds?

Hi, I'm new to the world of Bitcoin and crypto, and my question is: where do you keep your seed phrases and are you 100% confident hey're safe? I thought about buying a safe and storing them inside placing them on a metal plate, but of course, in an order that only |'I know (e.g., if Cherry is number 1, put it on number 24), but it's much more complex than that. However, I'm quite pessimistic and think the house could explode and I'd lose evervthing, so I'I definitely store them in another safe at the house of trustworthy people (who won't know the order of my manual encryption). Is this a good plan' If so, what kind of metal plate do you use?