Hey, I study it atm, currently doing A2. With AQA especially, it totally depends what units you do. For example, at AS we did papers RSS01 and RSS02, meaning it was pure Philosophy and Ethics, instead of much religion. We did topics like Utilitarianism, Situation Ethics, the Abortion and Euthanasia debates, Immanuel Kant etc. Personally I absolutely love it and am doing Philosophy at Uni, I'd be careful as to what units you choose though as some will be easier to self teach than others. Good luck!