I never used to be interested.
It’s not that hard to learn.
Just remember: If you don’t like to do something, it’s right.
If you like to do something, it’s wrong.
Kant said to “act as if your maxim were to become universal law.” In other words, if you are considering acting (or not acting), can you imagine that your action (or lack of action) were to be binding on the rest of mankind. If you can, you are acting in accordance with duty and thereby morally.