The two biggest problems I see new players have other than SA, is greed, and over controlling the plane.
Greed because they pull and pull to get a shot only to blow all their E and end up a sitting duck. Fly for position first, once you have position then move in for the shot, if the shot is not there fly yourself back into position while bleeding the E of your opponent. Don't dump all your E for a shot that may not get the job done. This is where knowledge of the different planes will help you in making the correct decision.
Over controlling because when someone gets behind a newbie they normally make violent flight control movements. They pitch up hard then turn hard. trying to pull the nose around for a shot. All this does is bleed your E, and leave you vulnerable to getting popped. First thing to do is assess the situation. How far back is he, is he higher or lower than me, is he gaining on me or am I pulling away. Again this is where knowledge of the different plane types will come in handy giving you an idea of how best to defeat you opponent. I know that it can be difficult to take the time to look around and see what is going on when you feel that you are about to be shot from the sky, but nine times out of ten things aren't really as bad as you first perceived, and making an informed decision can mean winning the fight, and the tenth time, well if he's that close on your six you're probably going to die anyway.
Lastly, there is no easy way, it takes time and practice. Learning the strengths and weaknesses of each plane and how best to defeated them in most situations, or being able to judge E states aren't things that most people pick up quickly. So don't get discouraged every fight is a learning experience, and believe it or not you learn more from the ones you lose than you do the ones you win. I've been doing this for a long time and I'm still learning new things. Fly your plane a lot, learn how to fly the edge, and how to recover when you've taken it too far beyond the edge. Learn what it feels like when it's heavy and what it feels like when it's light. Stall and spin it in every possible configuration until you can recover without breaking a sweat.