When turning left from a one-way road onto a two-way road, what is the first step?

When turning left from a one-way road onto a two-way road, the first step is to begin in the left turn lane. This is essential because the left turn lane is designed specifically for vehicles preparing to turn left, ensuring that you are positioned safely and correctly for the maneuver. Being in the left turn lane allows you to align your vehicle properly with the direction of traffic on the new road you are entering, while also reducing the potential for confusion with other vehicles.

Positioning yourself in the designated lane not only increases safety by clearly indicating your intention to other drivers but also facilitates a smoother turn. Other choices may involve relevant actions in the process of making a turn, but without starting in the left turn lane, you can't effectively execute a left turn while complying with traffic laws and ensuring the safety of all road users.