You will likely find a class or two diving there. There's usually a group or two of regular divers there as well, hopefully you can find someone safe to buddy up with. The central part of the basin will be near-zero, to zero viz once the students start kicking it up, but you can watch, and time your tour around them if you are patient. It usually clears pretty fast.
While you are waiting on the basin to clear, take a tour around its edges. This is an often-missed dive area. It's shallow, so you may want to practice your frog kick to keep from silting things up yourself, but there's lots to see, particularly in and near the root structure of the cypress trees. Fish, frogs, turtles, crayfish and more frolic about the roots, mostly unconcerned with all the swimmers and divers nearby.