Helpmeplease asked
How do you get into Aero's
I'd suggest following the link posted by stiknruda. Then getting in touch with your local airfields / flying schools and asking if or when they might have an aerobatics instructor available. For me I was just in the right place at the right time on Monday, but now I know these things go on I'll keep an eye out and sign up for the next session when it comes around.