Well, just try to relax and don't be afraid to make this or that mistake :) Your counterparts in a dialogue, even if they are native speakers, understand everything. They are not going to stop talking to you if you just think what to say a bit longer than them. Also, that might be because you didn't have enough practice. This may be easily improved with the help of making english-speaking friends in real lufe or getting penpals here on Italki. 😁

Hi, Amy! It's ok to be nervous when you're not sure about the language that you study. Especially if you speak to a foreigner, ESPECIALLY if it's a native speaker (sometimes they are really scary;)) Feel free to contact me if you need any help with English.