Etsy shipping when you travel full-time?

Hi! I’m getting ready to start selling some handmade items on Etsy, but I’m very new to Etsy shipping and honestly don’t fully understand how the shipping calculations work yet.

The part I’m especially confused about is that I live and travel full-time, so I don’t have one consistent location that I’ll always be shipping orders from. I’m usually in a different city/state every week or so.

How does Etsy calculate shipping costs when the seller’s ship-from location is constantly changing? Do you have to update your shipping ZIP code every time you move to a new area? And if someone places an order while I’m in one state, but I don’t ship it until I’ve moved into another state, does that mess up the shipping price Etsy charged them?
I’m trying to figure out the easiest way to handle this without accidentally undercharging or overcharging customers for shipping.

If anyone sells on Etsy while doing vanlife/RV travel/full-time travel, I’d especially love to hear how you handle your shipping setup! I’m completely new to this side of Etsy, so any advice is appreciated.