Legal Question in Real Estate Law in Florida

Yes, you can sue your neighbor if your homeowner's association does not.

You might be able to take your neighbor to small claims depending on the relative value of the rule that is broken. For example, you can probably go to small claims if your neighbor has a red garage door when the covenants say garage doors must be blue. Alternatively, if your neighbor built a large playground in his back yard and you want it removed, then you will have to go to circuit court.

yes, if the HOA does not. Not enough facts to know if you can sue for harrassment.