Definition
This is said just before one embarks on something that requires courage or is being attempted for the first time.
（表示将要开始做某件需要勇气或从未尝试过的事情）我要开始了！看我的！
Alright, I've never given a public speech before, so here goes!
好吧，我从未公开演讲过，所以我要开始了！
I’ve never tried rock climbing, but here goes.
我从未尝试过攀岩，但看我的。
This is a brand new recipe, I hope it works out. Here goes!
这是一个全新的食谱，希望它能成功。我要开始了！