Welcome to the game. Most anybody you ask will be willing to help. The training arena is a good place to start.
I've tried a few other online flight sims and in my opinion, this is the best one.
The object of the game is of course to win the war. But if you just want to up a fighter and fight there's always a furball around somewhere. If vehicles are your style it's faily easy to find a tank fight, depending on the map. If you like flying bombers, go for it.
If you haven't got one, get yourself a stick, it'll make the game alot more fun. There are people who are very good at flying with a mouse, maybe you're one of them. Myself I use a saitek st290pro I got from wal-mart for $20.00. There are guys out there though that are using sticks that cost hundreds of dollars.
Use the offline mode to practice, you're the only player, and Skuzzy has seen fit to give us a few drones to shoot at.