Successful people start before they are ready. There are many doubts, fears and limitations that if you try to cover for them all then you will never start. It is easy to get bogged down and overwhelmed with reasons why things will not work out. Of course you should do everything you can minimize failure but there is always a chance you will fail. Failure is a given. You are going to fail no matter what. The fear of failure should not stop you from starting because the more you try the more you have a chance to win.