The Florida requirement for becoming a broker is 24 months experience as a licensed sales associate (see link below for all requirements). Assuming you're thinking ahead to when you've completed that requirement, the pro's and con's of working on your own vary.
If you value an office trade name, feel you need supervision, or just like working around other agents, then maybe working with a broker in an office suits you fine. Offices also usually provide support services, such as transaction coordination, marketing and other administrative support. That support is never free, however, it is paid for by the commission split that goes to the broker.
If you're confident that you've acquired the knowledge, experience and skills to supervise yourself or even lead a team of own, then you might enjoy working as an independent. I left a big franchise office about 8 years ago and have never been tempted to go back to one. Working for yourself is the ONLY 100% commission split contract available, though you would be picking up 100% your business expenses, too. Working independently means you have to be self-motivated (in my never humble opinion, coaches are for wimps) and self-reliant. You may find that meeting with other brokers regularly provides a good source of peer dialog and professional development. I meet every month or so with an ad hoc group that is a mix of senior-level salesmen and brokerage owners, but the discussion is all technical, never motivational.
It all comes down to how you want to run your business.