Wouldn’t be ideal for non swimmers

First of all the bus that picked us up was old and need some works done. A 45 minute drive turned into a 11/2 hour drive. We picked the sand bar as my husband and I both can’t swim. I was pleased that we got to do some snorkeling together. We did see some turtles as well.
Then it was the deeper sea snorkeling. I was so afraid of the deep sea. So we ended up waiting in the boat for over an hour.
There are actually a few coaches on the boat. If they would Guide us through that would be a lot easier.
We just felt left out from the whole group.
Advice,