After movement input do this. You can add a branch before doing it all to prevent the rotation when your character is climbing.
Here’s what that looks like for me. The animations are a bit misleading but the floating arrow points in the actor’s direction. The direction is printed to the screen in the top left as well, this Print String and its Select node can be removed.
Keep in mind you may need to play with the values depending on which direction the camera and input actually consider to be right and left. In my example an Actor Rotation of (x0, y0, z0) is considered right, which is the direction I’m facing in the beginning of the video and left is (x0, y0, z180). Let me know if you need more explanation.