Stress about creating my coaching business

I have the project to quit my job in November to create my coaching business but I am feeling a lot of stress and anxiety with thoughts like:
If I fail I will not be able to recover.
My professional life will be over.
I am afraid of feeling depressed and not be able to move forward.
I am afraid of feeling unworthy.
I am afraid of being broke.
I am experiencing feeling “depressed” ahead of time.  I feel trapped in this anxious feeling and I do not know if I should allow (which I do) or change my T.  I feel bad and I make it mean that I will not be able to succeed. My brain tells me to not try. Trying to find escape road (I should stay in my job, just asking for part time).