There are a lot of businesses out there that offer to help individuals prepare for the Florida contractor's license exam. Obviously, it can be hard to know who to trust - but JW Surety Bonds has this helpful resource for navigating different offerings: Top 6 Contractor License Schools in Florida.
It's also worth mentioning that companies like Licenses, etc. make a living helping contractors get licensed - and they may have prep materials or be able to provide referrals.