One thing I warn new riders about. Always be alert and be a defensive driver. Often 4 or more wheeled vehicle drivers think you're on a regular bicycle. They don't realize how fast you're going and pull out in front of you. So always be alert.
Get a bicycle computer so you'll have a speedometer
I prefer the wired ones over the wireless ones. Helps to avoid speeding tickets. Fully and completely obey all traffic laws. Stay off sidewalks they're for pedestrians. If you do that the police generally leave you alone in most places.
Since you're in Florida I suggest reading this.