Well first learn to take-off and land... and do it fairly well. A great starter plane is the Hurricane. Its a good teacher of basic flight and gunnery (great sight coupled w/ some fun guns

). After some time time in that, try out the 109(40'-43'). The 109 should teach you the basics of air combat. You can't outturn a spit, but you can out-run and and out-climb it. Get above him and dive down, shoot, and zoom up. Rinse an' Repeat

. Done correctly this is called Boom n' Zoom, however done incorrectly and they call it "a ram"

.
There's a feller named "Dart" that has some nifty videos on ground attack amongst other things:
http://www.darts-page.com/
I'd advise not getting used to the La-5FN, La-7. You get better by getting shot down (you do, really!), and you don't get shot down often in them things. Get into a bomber once in a while too, this sim needs more mudmovers.
Oh and if your taking potshots at friendlys in the QMB, goto your radio (tab I think), goto 9. Frequency, then switch it to enemy. You won't be hearing those annoying screams any more (especially the Germans... Russians made the Germans sound like frightened children!

)