A start-up law practice is a small business like any other and faces the same challenges of identifying ones market, competitors, etc.. A good way to determine the feasibility of starting a law practice straight out of school is to write a comprehensive business plan and a companion marketing plan. It will force you to be brutally honest and confront your limitations in every facet of business including ones you weren't aware of, and if you can struggle through the exercise and emerge with a robust plan, you'll be well on your way to take on the challenge. Also do not hesitate to consult with business professionals and allow them to poke as many holes as they can in your plan, better to fail on paper than in real life. There are many online resources available as well as software packages to help you develop a plan. I recommend taking as much time as you need to embellish your ideas and way forward.