Before I get into explaining HOW to be a fluent speaker in English, you need to know that there is no language that can be learnt just by memorizing.
The best way that I would suggest is that try talking in English, since you want to learn it just by talking these will help you a lot :-
listening, talking, watching basically doing everything in English.
Reading and writing will not improve your oral skills but only develop your lecture and comprehension skills.