Well Romeo Romeo, I'm going to go against all the advice given on the Pitts.
Your goal, I would guess/hope, is to perform solo aerobatics. Now the Pitts is a magnificent beast, quite probably the finest machine any of us will fliy outside the military, but it is very sensitive (good thing/bad thing) and it's a real trick to know what is front when you are trying to land it.
So although you will get to the aerobatics box nice and quick, you will spend all the time saved going around and around and around in the pattern working out how to land it safely. In fact probably a lot more.
It's also a taildragger, which again is marvellous, but you don't want to be spending £200 an hour on an endorsement and learning how to keep your feet moving when you are on the ground.
Also, it has a splendid motor up front which will do a great job of moving your blood all around your body, but it also allows you to power out of mistakes.
So I would say learn to loop, roll, spin etc on a crappy old aerobat and get yourself to a level when you can solo. Then pick a victim and take them up, as the real fun is when you show your new skills off to a mate.
When you have learned how to make a pig like an aerobat work magic, go play in the Pitts.
Also they do a good curry at Leicester.