There are virtual squadrons you can join, but typically you'll need to know the basics first. Fly the tutorials that came with the Hornet, fly them more than once, fly them as many times as you need to get familiar with all the systems and how to take off, land, navigate, etc. Remember the F18 (A10, F16, etc) are "study sim" level - highly realistic and require a significant investment in time to learn. The payoff will be understanding and being able to fly realistic aircraft in simulated combat scenarios. Read the manual, resolve any questions you have on how something works - be it weapons deployment, navigation or anything else. Post questions in the forums, watch training videos on YouTube. There is a lot to learn.