if your looking for advice, try to make friends with people and don't pick them up in your truck and don't bring them over to your house. If your friends are chill, then you can show them the stuff you have, and if they change, drop them
I believe you are referring to the "big three". Percy is the child of one of the "big three", namely, Poseidon. This knowledge makes Percy feel special, as he shares some of his father's traits.