[dice]

If chickens are scarce, you might find people around town that
have pet rabbits (and rabbit manure to get rid of). It is a lot less
messy to work with than chicken manure.

Is this not semi-coastal Florida though, meaning warm and rainy?
I would expect that what you have in most abundance
is growing green stuff. If the grass in your yard is not growing
at this time of year, everything else must be. Green weeds with
soft, not woody, stems will provide what grass clippings normally
would in terms of carbon-nitrogen ratio.