I found Florida law on riding a bicycle on sidewalks. Looks like I'm good to go!
"s. 316.2065 – Bicycle Regulations
(10) A person propelling a vehicle by human power upon or along a
sidewalk, or across a roadway upon and along a crosswalk, has all the
rights and duties applicable to a pedestrian under the same
(11) A person propelling a bicycle upon or along a sidewalk, or
across a roadway upon and along a crosswalk, shall yield the
right-of-way to any pedestrian and shall give an audible signal before
overtaking and passing such pedestrian."
They also suggest you check local ordinances. I haven't found anything for my county yet and I don't live in an incorporated area. However, in the winter, the average age of a driver here will be about 60 years old. You couldn't pay me to ride on the roads during that time. I have a long sidewalk separated by a canal from a very busy 6-lane highway. I think that's the best place for my to ride. The only downfall is I will need massive volumes of sunscreen as there is absolutely no shade.