Most countries start with a small team using a Telegram group to share information with interested persons, a map so that people can lookup already existing places and a form where people can submit new places in structured form.
In the following articles you will find information how to create and manage these tools:
How to create and manage a Telegram group
How to create a Gmail account @gmail.com
How to create a Google My Map
How to maintain a Google My Map
How to create the Google Form