The hardest part was just to get it started .

最艰难的部分仅仅是开头。

People tend to forget the second part .

人们似乎忘记了第二部分。

But failure is part of learning . "

但是失败是学习的一部分。”

Let 's take the second part first .

让我们先看看第二部分。

A mentor can be a crucial part of this . "

而导师在其中发挥着关键的作用。”