Starting Coaching business

Hi, how I can coach myself into massive action of starting on first steps of the coaching business? I feel paralyzed with fear and I keep on learning / looking around at other coaches and thinking that I won’t succeed / I am too late to the sector, as I don’t have yet any definition of the niche that I could serve. I am about to start my Life Coach Certification program in 10 days and I wanted to have something lined up business wise, but I keep on getting more and more scared.
I understand that it is my thoughts and feelings combined but I wonder how to overcome this cycle. Thank you!