Step 01: Find Your Trust Document
Read it before you do anything else.
Before you make a single decision or move a single dollar, find the trust document and read it cover to cover. This is the instruction manual for your role. It tells you who the beneficiaries are, what powers you have, what distributions are required or discretionary, and how successor trustees are appointed. If you don't have a copy, contact the attorney who drafted it, the court where it was filed, or the person who named you trustee.
Keep a digital copy somewhere secure and accessible. You will refer to this document constantly.