After enjoying the game for a few days I can say that in all honesty, RougSys (as right now) might seem complicated and compared to ED it is.
But compared to games like Falcon and DCS its actually very manageable. Simple, even!
There are a bunch of systems you will have to learn what they do, how they function and how you can control them.
Much of it will however be controlled by the ships AI (not implemented yet) and at its simplest you will have to learn how to start the ship, then the AI will more or less take over.
The interesting part though is that while the AI will react to faults and warnings, and help with various other systems, it will react according to predetermined pattern of analysis. This pattern might not always be the best option depending on your current situation and unless you know how to do these things yourself, youll be in trouble.
And of course, this AI might malfunction leaving you with ONLY manual input.