I'd start with a bit of "liquid courage!"

Is it that you are shy or you can't pronounce?

Just be brave! Even if u will do some mistakes it is not a tragedy!:)

I also used the easy words ,because i can remember so many words,but i can talk it bravely. I advise you speaking English bravely .There is some help in future.

You can start conversation with some simple greetings,like,"hi,what's up?" 1.how are you/how are you doing? 2.what's new? 3.how are you getting along? 4.how's it going? 5.How's your life? there are so many ways to start talking in English.