KISS
Your basic documents for your final days on earth are the will (for when you die) and the advanced medical directive (sometimes called a living will) primarily for your medical affairs and a durable power of attorney primarily for your financial affairs. Both of the latter are for when you are still alive.
Here's a link:
https://modernsurvivalblog.com/health/basic-legal-preparedness/Any trust comes after these. Only about a third pf people out there have wills in place and its these that cause the largest angina in the survivors.
