This is an important question, as the study of ethics and ethical living is essential for life.
The first stage in ethical living is to develop an ethical framework to interpret the world and life. So, for example, if a person learned an ethical framework, such as a Christian view of ethics, then he or she must flesh it out in real life. This is the hard step of ethics, as life is complex and rarely straightforward.
For example, if you believe in the legitimacy of governments and the government becomes corrupt, then what should you do? Peaceful disobedience? Radical protest? Or something other? It is not easy. However, by thinking about such questions will sharpen your insights and eventually, you will be able to act ethically.