* Determination: "I'm going to do this!"
* Challenge: "Let's see what happens!"
* Uncertainty: "This might work, might not."
Here are some examples in context:
* "Y va pour le dessert!" (Here goes the dessert!)
* "Y va pour un nouveau départ." (Here goes a new start.)
* "Y va pour un grand voyage." (Here goes a big journey.)
So, while there's no perfect one-word translation, the closest English equivalents are:
* Here goes
* Let's see what happens
* I'm going for it