FC2 is a good choice to learn the very basics of flight, the setup of controllers, and a VERY VERY basic familiarization with weapons and their systems in the cockpit.
Learn FC, and learn it well- but try not to tattoo it onto your lobe so permanently that you can't transition to DCS. DCS is as close to real as it gets- and getting closer. FC is "EXTREMELY" limited in avionics modeling. There's a lot of creative liberty in use to fill in the modelling gaps of all FC planes and their systems- especially weapons & sensors.
I recommend you spend some time in the Froggies to gain experience with the advanced flight model- which is still pretty kick ass even with DCS out there.