You're not light on your feet and can't go at any moment.

你脚下已不轻，你现在也不能去哪里了。

youdao

Usually beginners will dance this dance in a more stiff manner, but for a look that is more advanced, you should no longer be looking stiff but you should be loose and light on your feet.

通常初学者在跳这个舞的时候会显得更僵硬，但是要从外观上看起来更高级的话，你就不能再这么僵硬而要使脚步放松、轻盈。

youdao

For as long as your feet on the ground, don't put yourself too light; as long as you are living on earth, don't see myself too big.

只要你的脚还在地面上，就别把自己看得太轻；只要你还生活在地球上，就别把自己看得太大。

youdao