Flying a SIM from the cockpit (FPV) is not going to help you much for flying an RC model. Yes, you understand the basic aerodynamic fundamentals but there are several key differences. Most importantly, it is initially very confusing controlling an RC model when it is approaching you versus flying away from you. Coming at you, your brain says I want the plane to go to the right (your right), so you push the stick right, but in actuality that makes the plane go left. Likewise when the plan is inverted, the elevator and rudder are backwards from what your brain may tell you to do (and, yes, you will unintentionally get upside down at some point). Second, there is no physical feedback or instrumentation whatsoever to give you cues as to what is happening or what to do. Third, you are much closer to the ground and things happen much more quickly. It takes a while to learn no to panic and over-control the plane.

An RC flight sim like Real Flight or Phoenix (there's a few others as well) provide a more useful training experience. Even then, it is highly recommended to have your first few flights with an instructor at an RC club (almost always no cost). Not to say you can not do it on your own but be prepared to crash a bunch. A high-wing, slow-flying, foam plane will ease the process but you can count on crashing a bunch while learning and hopefully the plane survives. Be aware, like the little RC helicopters, the real small foam planes don't fly very well or realistically. And the larger the plane, the more open space you will need to fly it. Its easy to underestimate the space needed until you're in the air and then its too late.

The best route is to visit a local club (see modelaircraft.org for clubs in your area), see what planes they are flying and equipment they are using and inquire about flight instruction. They can help you avoid buying the junk toys that are out there, make recommendations as to a good plane, power system, and transmitter system, and get you over what can be an expensive hurdle of your first few flights. I've been an instructor pilot and had naturals that could get the hang of it in 1 flight and others that took several months to become self-sufficient.