To learn something, learn about something or learn (how) to do something is to generally acquire knowledge about it. To study something is to learn about it in an intensive, systematic way, such as in a course or through scientific work.
The verb "put" is very useful on its own, meaning "to place", "to set", or "to move to a particular position". It's also commonly used in a number of phrasal verbs and idioms. Learn and practise some of the most important of these in our exercise.