Any tips for a newbie, I've never played a plane game before :/
Play through the tutorials, and spend a while flying reserve/rank 1 aircraft before attempting to move up the ranks.
The mouse aim system was strange to me as someone who had played a fair few flight sims before; in essence you don't actually control your aircraft, instead you control the "camera" and the game automatically maneuvers the aircraft to go where the camera is looking.
It sounds like a strange system, but once you get used to it then it's quite intuitive (albeit difficult to perform some maneuvers with).