Decide if you want to start a business and why. List all the reasons why you would want to run a business. Then remove the following, if they are in your list: Money, power to do as you please, less work, more money, more free time, less stress, less work, better work conditions. Do you still like your list of reasons to start a business??? If so:
Start slow. Really slow. If you have a full time job, try to find work outside of working hours. Plan. Do the best possible work to build up your client base, and then pursue it full time when the time is right.
IT is one tough market, you will be competing with people who know more than you; and people who who know less than you but are able to bull**** better than you. Its not about your skills, or services, and there is no magic market that will supply you with endless cash. You need the right skills and the right attitude....