It’s not complicated at all. I’m not at my computer so I can’t send pics. Follow the normal procedure for attaching a spring arm to your character. You can use any of the tutorial projects as they all use a spring arm. In the BeginPlay event, drag a reference to the spring arm into the blueprint. Drag off of it and look for absolute location. It should give a node with three checkboxes. One for location. One for rotation, and one for scale. Attach the spring arm as target and the white line to execute.
Click the rotate check box to true. Then play the game. The spring arm will follow your character around but not rotate with it. Then you can add code to set the world rotation on the spring arm however you want my creating s rotator and setting the spring arm world rotation.
Here is another answer to your question with a details.