I’m not in Florida but I would try to get Sugar Dragon and Yellow Dragon. Sugar Dragon is self fruitful and produces probably the most blooms and fruit out of all the DF varieties. The fruit are very small but one of the best tasting and my vine set 4-5 crops this year, it’s actually still holding late Fruit now. Sugar Dragon even if the vine is small, will set fruit, one of the most precocious varieties.
Yellow Dragon is also self fruitful and crops later in the year to give an extended season. Yellow Dragon is very sweet and tastes different than other DF varieties.
Both these varieties can be kept smaller and still be very fruitful.
Halley’s Comet is one of the slowest to fruit varieties and has fungal issues in my yard. It used to be one of my favorites but I now don’t recommend it due to disease and production issues. I would go with American Beauty over Halley’s Comet.
Simon