How about you join your local aviation club (if there is one) and try out glider flying for a bit. It's comparatively inexpensive and when you start your air force training you don't train on a jet immediately but on propeller driven planes and having flown gliders before will already give you an edge over those who haven't flown anything in real life before. You'll also learn the basics of aviation, navigation and meteorology which you won't have to learn again in the air force then (and you can already show off with some knowledge and flying hours at the job interview).
Learning just from a video game sounds a bit odd to me. Sure simulations have become pretty good but it's not a replacement for the real thing.
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Putting Germ back into Germany. 
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