I'm not saying it cannot be done but It may well take an "Act of Congress"
The major that I worked for and all others that I'm aware of do not take visitors to the simulator for many reasons. One would be that there would be training going on and any visitors would be a distraction to the operation. Another would be for security reasons and another would be liability reasons. Generally speaking there is hardly ever any "open" time when the simulator is not being used for training or maintenance "tune up". So, should you wish to fly the simulator, keep working and studying and get hired as a First Officer. And then I don't think you will think it's so much fun