Hello, friend.
Well, if I had summarized them that way in less than 10 lines, perhaps the story would be different. 😂😂🤗
There's too much information to understand, you have to follow it step by step. I thought about using boats from the beginning, but it's a competition, and if you don't do what the teacher says, you run a risk.

I understand the processes. What I can't figure out, and I've tried several times, is setting a (GO) order (yellow arrow) for any of the buses or cargo trucks.

I'll learn how to do it; the game still interests me.