I’m not familiar with flight-simulators in general, and had a lot of troubles picking up the controls. (Loved it nonetheless.) This game absolutely needs a tutorial mission.
I know there are tutorials in the galley, but these feel like doing homework, and not having immediate context makes it difficult to understand what these thing do and why they are important. Nothing beats being able to do the thing at the same time you’re taught how to do them.
There’s another game I love with a similar vibe and structure as yours, Jet Lancer, which does a great job at setting up its tutorial. You should take example on that.