Another point to remeber about aerobatic flying, while it's nice to fly a purpose designed aerobatic plane like a Pattern plane or an Extra, Edge, Ect.
these types of planes aren't needed for learning aerobatics. A trainer is a great way to start flying aerobatics. Trainers don't roll axial, loop as easy,
hold a knife edge or generally fly as nice as a sport model, so why use one for learning aerobatics? They help you to develop the skills you will need
to transition into a more advanced plane. If you can fly a straight line, roll without losing altitude or major deviation of heading, pull a smooth ROUND loop
(sounds pretty easy, but try doing a symmetrical loop starting and ending at the same altitude and your first attempts will dissapoint you) all with a trainer
than when you do move into a sport model plane you will be suprised how much better your skills will be, and how much better your flying will look, to you
and others. (if you care what others think).

Like Ken, Minn, and all the other experienced pilots say. Don't shelf the trainer too quick, it is suprising what they are capable of, add some more throws
to the surfaces and maybe some more power see what those flat bottom high wingers can do. You will be pleasntly suprised.