which is easier to understand philosophy or ethics
Ethics is usually easier. There are less reading materials than in philosophy, and the units earned is also less. 6. Ethics is interesting but although philosophy is harder, your mind is challenged and you end up studying because you are interested vs you need to get through the subject.
The better way to parse the difference between morality and ethics is to say that morality is the common, everyday evaluation of whether a behavior is socially acceptable. Ethics is the critical reflection on personal and social morality.