“万事开头难”用英语咋说？

Everything doesn't start easily.

The first step is the hardest.
万事开头难。

All things are difficult before they are easy.

It is the first step that is troublesome.
It is the first step that costs.
其实有很多，只要表达得清楚就可以。不过我几个美国朋友觉得这两个版本比较通用。后面那个口语一些。take your pick.

Taking the first step proverbially costs the most.

Everything are started with hardship.