(I am just forcing myself to write more english. Excuse me for that)
I have listened to the your answer uploaded by Qiuyu.
1. You have a quite sound accent. Your intonation makes your very easy to understand, for most cases. However, you seem to put improper emphasis on some words occasionally. ex. You should have raised your tone at the word "hard", which is the most crucial information in the sentence, in your first sentence in answer 2. Honestly, I didn't catch this word until I played it back the third time.
2. As you said yourself, you seem to be not good at organizing your thoughts. I suggest you try the 口语真经, which have sample answers for all questions. In addition, you may also try to write your answers down and review them like writings. Then, you probably can see why it is not well organized and how you can improve on that.