I cannot get it to load the addon either, its in the game but cant get them to load.

Click addons and enable the 5 parts, then click new game from addon and play Part 1

If you've never used a mod before, my tutorial video for a different mod should help you as it's the same concept. Just be sure to subscribe to all 5 addons, enable all 5 of them, don't have any others enabled unless you are sure they won't conflict, then start from the map at the top called Intro.
https://youtu.be/pbn1h_CuSSQ

Make sure all 5 are downloaded when start a game. I had only 1-2 and thought will just start playing. When got to 3: Nothing

So had to enable all 5, then restart the game.