Believing in earning potential

Part of me believes that I can be earning $1 million per year in 5 years, but part of me really wants to understand HOW this would be possible without feeling super overwhelmed, tired all of the time and sacrificing my life and my family (and my sanity). How is it possible? I know that these thoughts will absolutely block me from reaching my goal, but I don’t even begin to know how to not think this way. What steps do you take? And what if I am wrong? What if it isn’t truly possible and I am just fooling myself?