just did first battle

[birdsofmay]

oke so I just started my first online battle capture the airfield with 8 people.
and I was doing not so well I didnt shoot a single plane down well I damaged one fair enough but he chrashed himself aftherwards. I got shot down 3 times. So I think I need some advice how to shoot down planes with me
Bf-109. Where to aim when flying because I wouldt even shoot down a stuka trying to land on our airfield I was playing on sim.

Edit: my xbox360 name is pieter0712