Definition
An expression used just before beginning an action that requires courage or is being attempted for the first time.
我要开始了！
Okay, here goes, I'm jumping!
好的，我要跳了！
This is my first public speaking engagement, here goes!
这是我第一次公开演讲，我要开始了！
I've never done this before, but I guess I have to try. Here goes!
我从未做过这件事，但我想我必须尝试。我要开始了！