Hi Lara, I'm Brazilian too, I know the difficults that you have, If you would like to improve your English I recomend you pratice with series, like friends, or another simple series that use a simple English. You can watch in english with subtitles, and after translate the words that you don't know. This method It was helpfull for me. And if you wanna speak you can send me a message. We can pratice together.