Final answer:
The first step in a 3-point turnabout is to check for traffic and signal your intentions to ensure safety before the maneuver.
Step-by-step explanation:
The first step when preparing to make a 3-point turnabout is to ensure safety by checking traffic in both directions and signaling your intention to other drivers. After confirming it is safe, you will typically move to the right edge of the road, if not already there.
This initial step is crucial as it sets up the maneuver and ensures that it's executed without posing a risk to you or other road users.