The main thing to consider is the will to learn the English language. If not, it will be useless. Once a person had realized the importance of it, then he or she can bear in mind this phrase, 'Practice is the best teacher.' There are so many ways to improve the speaking ability of this language.
First, you need to know the functions of every English word if it is adjective, adverb, verb, etc.
Second, you can try to practice reading for at least 10 to 15 minutes every day.
Third, you need to use an e-dictionary to check the proper pronunciation of unfamiliar English words.
Last, check oneself reading in front of a mirror to check how you will deliver it.