Being able to speak a language is not related how smart you are. Anyone can learn how to speak any language. This is a proven fact by everyone in the world. Everyone can speak at least one language. You are able (speak) one language whether you are intelligent, or lacking some brain power.
This (achieve) by being around that language at all times. In your country, you hear and speak your language every day. You can (fluent) speak. You will notice that many people who are good English speakers are the ones study in an English speaking school. They can speak English not because they have been to an English speaking school, because they are in an environment where they can be around English-speaking people often.
You don't have to go anywhere to become a fluent English speaker. You only need to sur round s (you) with English. You can do this by (make) rules with your existing friends that you will only speak English. You can also carry around an MP3 player and constantly listen to English (sentence). As you can see, you can achieve results by changing your surroundings. Devote yourself to English and you will learn several times (fast) than before.