That's right. Know your limitation and capabilities before entering such business. If you have that skills and knowledge to start the business then go. In my school there is a case study that comes up with the conclusion that:

1. Never be happy to be an employee all the time. Most of the successful individuals are creating their own business and they are the boss of their life.
2. Some businesses starts in a very small investment. So, don't under estimate that one because that small entrepreneur could be the millionaire some day.