You can only learn vocabulary once you start using them in sentences, else you try to memorise soon you will forget them. Speaking like native English speakers is an art, first you have to listen properly and try to  imitate how they deliver sentences and words. For that first you need to find yourself which English accent and dialect suits you and you are comfortable with. Listening I would say is the best practice to pick correct pronounciation of the words and pick up the commonly used phrases initially. And in different areas different phrases are being used. Hope this will you inshAllah.