You can use a app available in app store called doulingo. Icon is a green colored parrot
Heyy... dont worry...
Speaking English means the need to do more Home work. There are different segments to this. First, listen others speak. Try to improve more vocabulary from them. Speak to more people in English. Maybe you will have a difficulty at first. But dont worry...with the passage of time you can master in it. 
Another way is by reading more of English books. Pick up more books..and start reading..note the conversations and practice similarly.
...I am sure practicing some of these will help you out. Also watch English Tutorials.