My advice,for what it`s worth is to pick a plane you like and spend as much time in it as possible. I figure about 100 hours of practice time and you should know the plane pretty good.
Practice time isn't flying in the mains,you need to practice stalls and recoveries,basic flight maneuvers and slow speed flying,all of which will get you shot down pretty quick in any of the combat arenas.
I suggest to most beginners that they get comfortable in a plane that is relatively easy to fly and turn off the stall limiter. A6m`s Brewster,spits,hurries are all good beginner planes to learn the basics in.
Putting the time in to really learn `your` plane will only pay dividends when it comes time to fight.
One last thing,several alluded to it already,who cares what plane you fly,those that do usually do so from the tower.