When you refer to "aerobatics," do you meam 3D or more precision?

if precision, then IMAC is exellent
http://www.mini-iac.com/DesktopDefault.aspx

See if there is a contest nearby and stop by.... also see if there is anyone local...
start with the Basic class and work from there... you would be surprised how cahllenging it is to fly a good straight line or a really good loop....
also with Basic, you can fly any plane that you want......

if looking for 3d, then there are a bunch of different ways...
http://www.teamflyingcirkus.com./
has some great info....

either way.... burn fuel... LOTS of fuel...