To speak in English we need a limited vocabulary we don't need to memerise while dictionary.So we can start to speak by using simple sentences. We can talk like
I am reading a book.
I am watching vedio.
I am studying English speaking.
I am eating.
I am writting.
I am cooking.
I am playing.
So I think you can start to speak like this after some days you will notice the changes so be patient and learn little and practice more this is very helpful way to speak.and try to learn some new words everyday and use this words multiple times.