Starting a business

I have two related questions regarding how to use the model. I deeply want/need to start my own business, but can’t seem to get over my fears of failure and what others will think. Just when I think I can start, in spite of my fears, I get stuck in this loop of not being able to decide exactly what business to start. I can see now that not deciding is a way of buffering to not do the scary thing and just do it. How can I use the model, or what questions can I ask myself to get out of this?
Thank you.