Hi Olivia!
Here are a few of my tips:
If you are planning on booking a car yourself (rather than one included in a vacation package), the sooner you start looking for rates the better. Rental rates are continually fluctuating! Just be sure you read the details to ensure you are allowed to cancel. Most car rental companies in Florida have online booking available. If you find a decent rate, book it. Keep copies of ALL confirmations. Then, if the rates go up, you're safe. And if the rates drop, you can cancel and book at better rates. [hope this makes sense!]
Join any/all car rental companies preferred member programs if they are offered for free! This will often (not guaranteed) give you a chance to avoid long "regular" lines, and sometimes offer extra discounts.
Check your credit cards or personal car insurance to see if they offer any coverage or discounted coverage for car rentals.
PS: No such thing as a stupid question! Whenever any of us have questions, you can almost always find the answer here! Lots of people with great info to offer!