Flight sims have been pretty good for decades now....MS Flight Sim has been around forever.
The hardest thing is landing...taking off and flying isn't all that difficult...then again, if he's never flown before, I find it hard to believe he was able to do all that, sim or no sim.
As always, conspiracy theories are popping up over this...
If you really want to go down the rabbit hole, this event occurred quite close to another recent event that many people haven't heard of, but is another conspiracy theory in and off itself...happened a few months ago...
Google "Seattle missile launch" and grab some popcorn...