nostr:nprofile1qqs0sd3uqe8j7a8cfwz93nnl9yff0uf493kcu89apkmzxsnp7nh5k0qpz9mhxue69uhkummnw3ezuamfdejj78xu66k has the best info available for keeping your crypto safe. You can start here:
https://jlopp.github.io/metal-bitcoin-storage-reviews//?ref=blog.lopp.net