I am in the same boat as an employee who left a cushy job at G to join a startup with the motivation to start my company, but I feel there's a limit to "prepara

I am in the same boat as an employee who left a cushy job at G to join a startup with the motivation to start my company, but I feel there's a limit to "preparation" and one needs to be honest and take the plunge. Else, I am bs-ing myself.