DCS will reward your patience, time and effort more then any other game on the market. It is a 'sim' so it's very deep in content and rich in reward. Take one aircraft, my advice is the f15c and learn how to start engines, taxi, change weapon load-outs, land, attack etc.. Once you have learned one plane all the basics are out of the way for the next and you start to see a uniformed consistency in the controls for each aircraft. Spend a few months with an aircraft, there is no rush.