If you started a small business just so you can work for yourself, i.e. you refuse to work for someone else, you are setting yourself up for ruin. Starting a successful business requires you to dedicate an immense amount of time. You must stay focused and be resolute. This is impossible if you are not passionate about what you are doing.
Before you start a business, be sure it is something you love. Your love for your business must be strong enough to push you through the bad days. Your passion must be strong enough to spread to your team so they can push through their bad days. If you can find this passion, you are never too young or too old to be an entrepreneur. Your passion will overcome any obstacle in your way. If you do not find this passion, your business will just be another job.