Making a map that when certain lines of script is said, it will add info the the map?

[YumaDazai]

It will be like in each chapter you will learn info about the kingdom and it will show in a notification box in the screen telling you about the new info.
This information will show in the map than will have its own gallery.
You will keep collection info about the kingdom till the end of the route and maybe when you finish collecting all the information something will happen like the kingdom in the map will be colored or you will open something like a photo of the kingdom's prince or a short script.
I'm having a hard time figuring out how to code this.
I should use an imagemap, right? I never coded something like this.

[Kia]

you need to create a screen for the map, preferably using imagebuttons, read about screens here: https://renpy.org/doc/html/screens.html
and you might want to use persistent variables to keep track of the information you want to store: https://renpy.org/doc/html/persistent.h ... persistent