Google My Maps macro

I'm an avid user of mymaps.google.com to create custom maps. When you search inside the product the URL unfortunately doesn't change, making it harder to create a custom search engine out of it. I'd love to do that though because I use the product way too often, it would be great to have a way to just type "AddToSaoPaulo {query}" and call it a day.

This is what the interface looks like. The issue is that the search bar takes a while to load, sometimes several seconds... Making me a bit skeptical about using the image search feature for a macro. Does anyone pls have a suggestion on the most effective route here? Thanks!

Maybe some of the javascript actions, or browser text field actions