Connect controls to Camera angle

Im really new to this, especially coding, and have been using the 'Rolling Ball' game to start out and then once finished, apply new scripts/assets/components. Right now I've added a third person camera. Works great compared to the fixed angle from the tutorial, however I've realized my ball's concept on forward, back left and right are relative to the world's axis as opposed to updating based on the camera angle (ie: I turn the camera left, control for forward is no longer what forward should be to the player). I understand how to approach the problem, but my coding isn't strong enough to sufficiently program the solution.