My own language experience
Any language has many words and grammar, It involves different ways to perceiving the world, different ways of thinking, even different ways to interacting. learning a new language, If you just learning the words and grammar that is make learning process difficult. Without learning the thinking and context ,the learning will become very harder than you did these.
Using the language that you learning to thinking,to talking,to making and keep friends,and then you are truly learning the language.