Hi there, I am just going into my 5th year as an agent, after leaving a 25 year career as a financial advisor. I have my own agency here in FL and let me tell you this, the financial rewards are good but the uneveness will kill you and your credit rating. I added an accounting & tax practice, (my own) 2 years ago and that is growing by leaps and bounds.
The insurance business is stagnant. Consider this, the majority of the market is "aging out" of life insurance. There are some sophisticated applications to protect and pass on wealth where it works better than anything, but those cases do not come along that often. Providing guaranteed income with annuities is the way to go both for your client and for you. You would need a securities license to do variable annuities, they do not work as well as one would hope as retirement vehicles.
Have a larger than normal nest egg to get you through start up. You will need to spend 35-40% marketing yourself and your agency and it takes time to build a reputation. It can be rewarding but the average insurance agent makes $55K per year. Try to get on with a bank to be an inhouse rep. They train you and bring you the fish in a barrel. I mean customers, yeah...
Don`t mean to discourage you just want you to have a good grip on reality before you make the leap. It can be a long way down before the first branch appears growing out of the cliff. And creditors do not have a sense of humor.