how to lean english?

Well, just don't be shy about it. Ask what you don't know, be brave and practice, just talk in english and laugh about the mistakes. Children learn to walk through falling, so don't worry about the "broken" English, more use, more reading and checking up dictionary/asking, more improvements.Making mistakes makes merry around you, it'll be lots of fun.

Just start speaking English, You will eventually make many mistakes but learn from them and slowly you will gain confidence and will learn it also. Also reading novels, newspapers will help you..