Welcome to the forum. Firstly, please check that your member profile is correct. You say your native language is Amara, that your home country is the Antilles and that your current location is in American Samoa. Your IP address shows that you are in the USA, and Amara is not a native language of the Antilles. It is important that you give us accurate information so before continuing, please update your member information.
In answer to your question, my advice is read, read, then read some more! Expand your reading matter to include types of magazines, books and articles that you haven't read previously. Have a good dictionary on hand to check every new word. When you find a new word, search for it on the net to see it used in another million ways. Then write five or ten sentences of your own using it. Find one really memorable sentences containing the word and memorise it so that you always remember how it's used.
Being surrounded by spoken English all the time will help too. When you are at home, have an English-speaking radio station playing in the background, preferably one that doesn't play a lot of music. Don't actively listen to it but you will find that, if your comprehension is already very good, any new words will stand out. You might not catch them in time to look them up in a dictionary but it doesn't matter.
Find a native English speaker to have a conversation exchange with a couple of times a week and make sure they explain all new vocabulary to you.
