The side of the ship that will face the port can change between cruises. It depends on what time the ship arrives and which berth they are assigned. It really makes no difference if your cabin is on the left (port) or starboard (right).
In regard to terminology. Port is the left side of the ship when facing the bow. Starboard is the right side of ship when facing the bow. The stern is the back of the ship. Forward is toward the front and aft is toward the back. The bow is the front of the ship.
Have a great cruise.