I just got a Nikon Z5 for my trip to Maine next month and I'm honestly so overwhelmed by all the options. I want to take nice landscape photos but also some of my kids running around without it being blurry. Right now I just have the one that came in the box but people keep saying I should buy better glass which is kinda confusing.

I have about $700 saved up and I really just want one lens that can do a bit of everything so I dont have to carry a giant bag. What is the best all-around lens for Nikon Z series cameras for someone who just wants to keep it simple?