Setup configurator New. The scoring is opinionated and still moving. Nothing you enter leaves your browser.
Risks

Export your plan

A printable handover document. Choose "Save as PDF" in the print dialog.

Never type a PIN, a passphrase or a seed word here. The document prints blank lines for those, so you write them by hand on the copy you keep. A file that holds both the map and the codes hands everything to whoever finds it.
People who should be able to act
Notary, lawyer or executor