The Blockstream Jade (original model) is probably the easiest for beginners, and the simplest to setup and use with a multi-sig wallet (multiple QR Codes and a single Blockstream Jade). As nostr:nprofile1qqst46ux9ue3swgwckh4e8dkftjamvh0cx5hmd2vv4gx26l69hxq2jcprpmhxw309akk7mnpvshx5c34x5hxxmmd8gurqwpsqyx8wumn8ghj7cnjvghxjmc5vqktvsaid, it is inexpensive, secure, and reliable.

I use a Blockstream Jade to protect the wallet which holds satoshis to cover the cost of my cremation and pay any unsecured debt. As far as my executor will know, this is the entirety of my estate. In reality, it is only a tiny percentage, hopefully, of the satoshis designated to whomever or whatever I choose before my death, protected by a separate undisclosed hardware device whose multi-sig keys will have been distributed in sealed envelopes upon death.