Warhammer
Guest
FWIW, I'll be insisting the DM watch me and my wife closely and ask for easy/benign dive sites for our week there. OW certified does not mean OW competent.
If you get too carried away with that request you could end up diving with the Discover Scuba divers. However, there is no shame in doing so for a dive or 2, especially if you need a little confidence building and a chance to work on your buoyancy/ballast. The upside would be you'd be on very shallow dives. But this is probably what the checkout dives are for.
I have never been to Sandals St. Lucia, but I have been to Sandals in the Bahamas and Jamaica and they usually sent multiple DMs on every dive. There is usually a leader, videographer, and a follower. They keep all of the divers in the middle and generally do easy dives. If you get a chance to do a night dive, after you've gained a little confidence, it's an awesome experience.