Like KristKustums mentioned, with the proper business education, you will be fine.
90% of small businesses fail or do not meet the owner/operators expectations due to underfunding and over capitalization.
I have never held a job in my life. I have been in business for myself since I was 14-15 years old. Buying used bicyles at thrift stores and yard sales, getting them detailed up, and running a "used bike lot" at the flea market on the weekends. I did body work in a rented bay in high school at night and weekend. When I went off to college, I ran an internet business, and started a rental property management company handling rentals around campus for off-campus housing.
I all depends on how bad you want it. Plan ahead and you will be fine down the road. My dad always said the best thing about being broke is it is only a temporary condition.