Gonna be there the week before Xmas. So won’t be able to help. However, check out Mermaid Scuba. That’s who I use when I dive there. They are a pretty good outfit. No problem being a single with them. The owner (Carlos) can be a bit grumpy, but he loosens up. His wife Wendy is great. They run a boat out of ornastad (downtown) but they pick you up at your hotel. Make sure to pickup one of the coupon books as you leave the airport. Mermaid Scuba usually has a 15% off coupon in there. As far as dives go, I recommend the airplanes. There is often a current there. But worth seeing/swimming through planes underwater. Good luck and have fun!