I wonder why most people wants to roll a ball with torque. Just use ADD FORCE (push it!)
here the method I use:
I don’t use Character BP…I work with a custom PAWN actor.
I apply the force to the ball static mesh component…I dont care the position or state of the pawn in the world…I work with the ball itself
I have a center ball pivot (scene component) that I update with the center of the ball all the time, so no matter the balls orientation, I always have the balls center with the world orientation in a pivot where I can attach another scene component that controls the yaw (orbit) of the camera) and also I control the pitch of the camera (up/down) in the spring component.
For the movement of the ball I just apply ADD FORCE in the direction of the facing camera for forward backwards and I use the right vector direction for the side moving.
Hope it helps