Even though I'm not a fan of this way of organizing an RPG table, I tried to present in this text some tools that can help you to develop maps and scenarios for your campaign.
Part of RPG masters and storytellers have absorbed this habit of previously preparing the scenarios and maps that will be used in their games.
If you are a fan of Tolkien, you should know that before creating the narrative present in the books “The Hobbit” and “Lord of the Rings” he elaborated the world in which these stories would take place.