You want to make sure that people understand you when you speak, so don't go stringing a whole bunch of idioms together in one sentence, nobody will understand you, you won't sound like a native speaker.

你要确保人们在你说话的时候能听懂你的话，所以别把习语都塞到一个句子里，没人能听懂你这样的话，这听起来并不像母语人士。