Extract the file named "The_Mandalorian_1.01.pak" stored in the ZIP, and drop it inside Starbound's "mods" folder. That's all, now you can start the game.

How to find Starbound's "mods" folder:

- If you installed Starbound through Steam, open Steam, go to your game library, right-click Starbound, click "Manage", click "Browse local files".
Now you should be in Starbound's directory, and you should see the folder "mods". Drag the file "The_Mandalorian_1.01.pak" inside "mods", and done.

- If you installed Starbound through GOG Galaxy, find the GOG directory, enter the folder "Games", enter the folder "Starbound", and you should see the "mods" folder.
Drag the file "The_Mandalorian_1.01.pak" inside "mods", and done.