Another thing to add about the Open Conflict server is the safe zones are areas where you can practice your air-to-ground flights on targets that will shoot back to a degree (usually AAA) without worrying about getting shot down by other air threats.
Lets you focus on doing clean runs and learning how your weapons behave.
Then, when you're feeling squirrelly, you can hit targets in the conflict zone where AI and player aircraft along with SAMs, etc., will be hunting you.
Like Shinhwa said, learn how to use the IFF system your aircraft has so you don't shoot down friendlies. Also take off from runways, not taxiways but that should be the case on any server.