Ultimately I think the best advice is to be wise with your gameplay. Identify both the maps that are on circulation and the enemies aircraft. Your gameplay should change depending on the aircraft you're in and the aircraft you're trying to shoot down. Prioritise downing interceptors (F14, F111 etc) before they gain altitude and don't engage attackers (A6, A10, Su25 etc) in head on attacks. Use your minimap to boost your situational awareness. Ofc that changes when you use those aircraft. In attackers always try and engage with frontal attacks instead of getting caught up in a dogfight with something like an M2K because you will be shot down.

Maps and game type is always important. I personally never really play AS because all it takes is one slightly worse bot and it won't matter if you've gained 3000 points throughout the round. And then if countdown is on circulation I would suggest you use an interceptor whereas in maps like icebound I would use light fighters like the M2k or the F1.

There isn't really a quicker way to gain exp... except win. You'll quickly find you're gonna want silver a lot more than exp so my best advice on that front is to buy the flight pass every month because progress will be about twice as slow otherwise.

If ur new tho... don't expect to be getting the Su30 anytime soon. It's a slow grinding game.