d's insurance store usually gives good advice-this time is no exception. I will be a bit more blunt...6 months to a year will only scratch the surface in commercial insurance-6 years is more realistic. However, if you have deep pockets and can afford to not land big accounts for a while then you might be ready in as little as two to three years. Otherwise you are an E&O claim waiting to happen! Most Aggregators, MGA's, Affinity Groups, etc. will be hesitant to bring you on board with so little experience. Maybe a few carriers on the personal lines side may take a flier with you, but don't count on any of the preferred markets to appoint you-if one does, be careful regarding premium commitment and control of your book should you not reach quota. Have seen it happen: quota not met, renewals sent out direct to your "client" by the carrier, account all gone, no more!
BTW: from what I have read and heard, even the seasoned pros in Florida are having a tough time. If I were you, I would latch on to a good independent and, if you do well, try to work up some equity stake with ownership-you immediately become part of a working model. Even if rebuffed, you probably can still make good living on commissions unti t he right opportunity pops up-they always do-timing is everything!