Okay, I'm going to try to explain where the elevator would be to go from the ground floor to the 1st floor, where check-in and other things are.
If you were facing the two VERY long escalators, you would turn left and walk/ride past the Fountain restaurant. When you went as far as you could (a short distance actually), you would come to where the Fresh restaurant used to be (not sure what's there now), you will be able to turn right and walk/fide down another short hallway. You would go past the narrow end of the Fountain restaurant when you go down this hallway. When you get to the end of that hallway, look up and you will see some directions ahead of you. Pointing to the right are
Restrooms,
Caribbean Room and
Central Elevators. Walk/ride to the end of that hallway and there are your elevators. Go up one floor and you are now on the main floor of the Dolphin. You basically have done a U around the Fountain.
See if this interactive helps you. Face the escalators, turn left, go to the end, turn right, go to the end, turn right to the elevators.
https://self-walk-imaging.captur3d.io/view/swan-and-dolphin/dolphin-ground-lobby