What i want to know is, for a PPL holder at a minimum of 45hrs, doing aerobatics must be a dangerous thing without much flying experiance, i understand there will be aerobatic courses out there, can anyone relate to such a course and give me any feedback on them?
It isn't that dangerous - you cover (very) unusual attitude recovery as part of the training, and you'll never be allowed to fly solo aeros until an instructor is happy that you can get yourself out of trouble.
There are a lot of aeros courses around, most based around the AOPA aeros syllabus. This is typically around 5-10 hours covering the basic aerobatic manoeuvers, after which it is time for solo practice to get from "safe" to "safe and accurate".
My other thing is, PPL holders, C152, C172, Pipers etc, are these planes very capable of doing much aerobatics? (sorry for being blunt, i dont know much on them as of yet) i done aerobatics in a Bulldog, and a Tutor.
The typical flying-school Piper/Cessna is not suitable for aeros - typically they are limited to stalls and turns up to 60 degrees AoB, with some also cleared for spinning. However, aerobatic aeroplanes aren't hard to find - most aerodromes will have one or more for hire.