Aerobatics is a surprisingly accessible sport. And it doesn't take a lot of flying experience to advance quickly. It is not uncommon to see a "newbie" with 200 hours total flight time handily beating an airline pilot with 20,000 hours. The world is filled with experienced pilots for whom "close enough" is good enough. What aerobatics takes is a desire to never stop learning. And never stop improving.
International Aerobatic Club: Getting Started in Aerobatics