Anytime you work for commission only there is a risk. Sadly, the truth is everyone won't make it. I've seen agents loose their cars, houses and lifestyle chasing this. But the upside is incredible.
The best advice I got when I first started was to treat this business like your training for the Olympic team. It's an individual team sport. Your flag is your company. Your events are your lines of insurance (they are all are individual events.) Your team are the people in your office. But once the games start it's all on you. If you win the company or country will be proud and give you all kinds of accolades if you flame out you won't even be mentioned and eventually be replaced. Just because Michael Phelps is on your team doesn't guarantee you any medals. Just because you might play hockey for Brazil doesn't mean you can't win either.
So I guess the point is that you have to take a critical look at yourself. If you have trouble with that ask your close friends and family what they think. But once you commit go 100% the whole time and require it from your management as well.

Good Luck