I already played tons of good flight sims and know all about the theory of flight, so I think it is rather redundant. However, if it is really needed, I might spend some hours on it. Can someone confirm?
When you say you've spent time on sims already, were they RC flight sims, or full scale (real plane) sims? The reason I ask is that full scale sims are not going to teach you anything about orientation, since you are generally in the cockpit. Turning the wrong way when the plane is coming at you is easy to do if you don't practice.