I've got my main private key encrypted and split across three metal wallets. Only I know the cipher and the order to unlock it.
I have three cryptosteels that I got free from BRD wallet, and I use them to store my private key.
Realistically it's probably a bit overkill, but I got them for free and couldn't resell them (I tried) so I just kept them.
I think you might be served well by just buying a laser etched piece of card from one the myriad places that do laser etching. You could encrypt it first and store the cipher on the card too.
Its better to be overkill rather than losing all of your coins just because you do store it on a way which is very less secure compared into this metal wallets.
I might consider on transferring my keys later on even though im not holding that much but this is way much more better than storing up your coins
into your email or cloud storage which do still have the tendency to be hacked or bypassed.
For now ive been storing my seeds on several flashdrives which i do kept on different parts of the house , its been divided on 3.