I'm also a rookie...
But a few things i've learnt.
- Keep your energy up, either height or speed.
- Don't become fixated on your target, its often not good to follow them into a dive. Often better to keep your height and eye on them and strike from above.
- Only fire when you know you will hit your target.
- Don't be afraid to break away from dogfight if you are being draw into fight where you don't have the advantage.
- Pick off bombers on the edge of formations..and don't hang around to get shot by their tail gunners!
Hope this helps.. but i have a lot to learn myself!