Hey there, welcome to DM’ing…
The maps are all included, the problem is that it’s just a thumbnail version of the map that you can’t use at the table. You have several options:
1. Battle Mat with 1"squares, where you would outline the walls of the room with a dryerase marker, and use that as your map… Drawback is that it’s one room at a time, and it takes a little bit of time to draw the maps, play the encounter, and erase and draw the next encounter.
2. office depot sells easel paper for presentations, 50 sheets for 20 bucks… the advantage is that you can draw the rooms ahead of time in several sheets, and you spend less time at the table setting up the encounters… i like that. this system is my backup. The paper has 1” grid, perfect for the DM to draw every single encounter.
3. I scan the module and print the maps to 1” scale. if you can, it’s the way to go.
Hope this helps. See the thread on the tokens for more ideas.