jeannie, your instructor should have discussed with you what you need to
buy.
the general rule is, you need to provide your mask, snorkel, fins, and weights.
i would suggest that you buy a weightbelt that takes soft weights. they are
easier on your body and equipment. you will probably end up with a weight-
integrated BC, so you won't need these weights for long.
as to fins, you should definetely buy open-heeled fins, which means you'll
need booties. even in florida, it's just so much easier to dive with booties,
as they act as "shoes" while you gear up and walk to the entry point,
and then they just slip into the fins.
hope this helps, and have fun!!