Speaking a language is a skill, like driving a car, playing a musical instrument or learning to swim. To be a good driver, you need to practise driving. You can read a book about car mechanics. You can study the rules of the road. But nothing is as good for your driving as spending time behind the wheel of a car, actually driving. It's the same with speaking English. No matter how much you study grammar and vocabulary, if you don't practise spoken communication, it's very difficult to get good at it. So maybe you talk to yourself in English as you go about your day. Or maybe you look for opportunities to chat in English with people you meet. But however you do it, the most powerful way to improve your English speaking skills is to use them.