I suppose it depends on what you are going to watch. A political discussion between opponents is a quite different thing that a soap opera.
Also, it's not just a question of words but more a questing of practicing the language and, for example, sitcoms use a rather basic vocabulary but the actors speak fast and use colloquial expressions.
So, since there cannot be a tangible answer to your question, just keep on learning and practicing and focus in making progress. And good things will come eventually.