How to improve my pronunciation in English?

Hi ! I'm from Spain, two months ago I moved to Florida. I need to improve my English speaking. I can understand more or less when the people talk to me but when it's my turn to answer I can't answer fluently. I always watch the TV in English and read subtitles too. But I don't know what I need to do to speak better.

I think you're on your way to speaking better. I would try to do two things, first try having more conversations, especially with strangers, since it won't be a big deal if you make a mistake! 

Second, try to watch movies, programs in English without subtitles. This will put the focus on your ears instead of your eyes. Practice as much as you can!