The driver will take you to an area where the porters are busily taking luggage from the cars so it can be loaded onto the ship.
Don't worry, I would be very surprised if the driver didn't know what to do.
A couple of things:
1. Dont' forget to tip your porter.
2. Keep any possesions that you have an immeadiate need for. The luggage will sometimes not be delivered to your room for a few hours so if there is something you have that you need access to then carry it on yourself.
The terminal where you check in is right around the corner from where the driver will drop you off. It is really very easy and nothing to be concerned about.
Have fun,
Jeff