To prime the pump, I thought this short discussion on Kant's Categorical Imperative on the BBC's In Our Time covers a lot of territory in a very short timeframe that might benefit you as you think on ethics:
I did listen to it. So for Kant we must do good for the next life (we must assume a next life) based on reason. According to what I listen for Kant there is a universal morality.
I am not sure if I believe in some universal morality, for me morality seems to be subjective.