Pretty cool. I’ve been using a Google Map for this, adding a pin for each place I’ve been. I use Apple Photos to some extent as well, as there is a map view, but that’s only good for places I’ve been since 2007.
My biggest concern with your project, as well as Google Maps and Apple Photos, is longevity. In 40 years will I be able to look back at an overview of all the travels I’ve taken in my life? I’ve been thinking I should probably have a text document with the basics, so at least I have the information to enter into something in the future, if all the other platforms die along the way.