Having some issues with very BASIC things. I picked up DCS World and FC3 last night, finally got the chance to play today. Got everything set up on my joystick (Logitech Extreme 3d Pro), but can't fire missiles or guns? I understand it's more complicated than "push button, kill russian" but I can't seem to find any information specific to FC3. The A-10 and KA-50 guides all call for clicking switches in the cockpit, which I obviously can't do in the FC3 F-15C. Google has failed me for finding a guide, as has searching the forums.
Short question: How do I kill things in FC3?
EDIT: Also no training missions for FC3, training missions for SU-25T don't work (click 'start', nothing happens).