get off on the wrong foot 第一步就走错了；出师不利；一开始就不对

【例句】
I have to be well prepared for the game tomorrow. I don't want to get off on the wrong foot.
我必须好好准备明天的比赛。我可不想出师不利。

You don't want to get off on the wrong foot.
你不想一开始就给人不好的印象吧。