If you have basic knowledge of English, the best way to be fluent in English is To talk, talk and talk. In our day to day life it may be difficult to find an opportunity for the same. I think here you can join any public speaking clubs like toastmaster clubs. You can google "toastmaster international" for more details. To join a toastmaster club in Qatar or to know more details you can contact me:
Thameem: 55720272