The short answer is you need to use thrusters and directional thrusters to actually make a ship turn.
The long answer. Rotation, pitch and yaw are a complex relationship between size, type and location. I am by no means a good builder but having used super star destroyers from the workshop here is what i have concluded. Thrusters are like a tenth the power of an engine, so to easily control a large ship you need ten 10X10X10 thrusters spread throughout the ship. Location is the next challenge. To control pitch your thrusters need to be as far as possible from the center of the ship gravity front to back. For rotation they need to be as far from the center going side to side. Yaw much like pitch needs to be as far from the center gravity point as possible. Directional thrusters seem to be weaker than a single direction thruster so work better as a filler to boost a good steering ratio rather than to achieve it.