So I have money. I have business ideas. But when it comes time to execute on the elaborate plan I have written, covered all of the bases, etc - I come up with some excuse as to why I shouldn't do it. Perhaps I need a partner, maybe I think it won't work. Maybe it won't be as profitable as first thought. I get cold feet when I go to pull the trigger... How do I get over it and grow some balls?
You get the bravery to do the thing by doing the thing.
Stop being in analysis paralysis and just get on with it. You build a business one step at a time, one action at a time.
Just get on with it.
Stop worrying about whether it will be profitable or not. You either want the thing or you don't. Do you want the desired result? Or not really?
Every day you stand still you are being blown past by people who are already running the race.
Get started. You are making far too much about the fear of failure. What's the worst that can happen? You lose all your money and have to start over. Big deal. Some of us have done this many times. That's what entrepreneurship is. Shut your thinking down and just get on with it. Or move on.